Showing posts with label Brighton. Show all posts
Showing posts with label Brighton. Show all posts

Thursday, 17 November 2016

Are Brighton legit and have Gary Monk and Steve Bruce turned Leeds and Aston Villa around?


The Championship is now more than a third played and we’re starting to see some decent statistical trends coming through, although the table doesn’t fully reflect those yet.

In fact, much of the middle is still quite a mess, but at the very top and bottom, the quality, or lack of, is showing.

In most meaningful categories Newcastle are head, shoulders, and sometimes an entire upper body above the rest of the field.

Meanwhile, at the other end, Rotherham look like a League One team already: it would take a serious burst of good fortune to even bring them up to parity with their fellow relegation candidates. Sorry Millers fans.

There are three quite intriguing games on TV this weekend as the major leagues return from the international break, so let's look in a bit more detail at the match-ups involved.


Brighton vs Aston Villa


Behind Newcastle, Brighton have put some distance between themselves and the competition, but while they are a statistically good team, this has been fuelled by the highest save percentage and second highest scoring percentage (just behind Newcastle) in the division. The combined PDO total of 123 (league average is 100) is actually off the (my) charts.



The problem maintaining this form will come if and when this hot streak runs out.

The Seagulls are only a midtable side when it comes to where they take their shots from, although they are one of the strongest defensively. This shows with Brighton just 19th with 29.65% of all shots being on target, while they are best at restricting teams as fewer than one in four (24.57%) opposition shots hit the target.

The other real key to Brighton’s success comes at when they are getting their shots on target. At level score situations Brighton have the third highest shots on target share in the division – 0.625 (or 62.5% of all shots on target).

Combine this with a 40% scoring rate (league average is 30%) and it is easy to see why they are such a dominant force so far.

When you are playing with the lead so often and can force teams to take more than half their shots (99 out of 182) from outside the 18 yard box, you have a very good chance of being successful.

Brighton’s opponents on Friday night, Aston Villa, have had a pretty difficult season so far which resulted in the sacking of Roberto Di Matteo with Steve Bruce replacing him.

What difference has that made? Well, Villa were actually a pretty much league average shots team throughout Di Matteo’s brief reign. He played a more open game than Steve Bruce has shown so far, which resulted in more shots both for and against per match.

But the killer statistic for him was Villa not being able to hold a lead due largely to a shocking 11% shooting % when one goal up. Indeed, Villa only scored ONE goal when leading under Di Matteo, and that has not improved since – they’ve only managed TWO shots on target when leading so far under Bruce.

It’s worth remembering at this juncture that Steve Bruce’s numbers especially are a very small sample size, but they can provide some interesting indicators.


Aside from taking a more defensive stance overall resulting in fewer shots for and against, the one real improvement Bruce has made is in shots on target share, from 0.51 to 0.56. Some of this may be down to shots being taken slightly more centrally in the box compared to Di Matteo’s team, but otherwise it is hard to spot what may be responsible for this. Perhaps it is just a case of Villa’s potentially potent strikerforce finding form.

Which brings us on to the other major boost for Bruce; shooting and save percentages – a fourteen point increase when combined. These factors, which can be subject to high levels of variation, have really powered Villa’s rise, although the aforementioned shots on target improvement will have helped too.



At level score situations Villa are red hot at the moment, and have goalkeeper Pierluigi Gollini rocking a 90% save mark in Bruce’s term. This is likely to cool off and when it does it seems likely Villa will find themselves stagnating in mid table unless other factors improve.


Ipswich vs Nottingham Forest


On the face of it Forest fans should be the most concerned in this fixture, but Ipswich followers have good reason to also be looking over their shoulders.

Life has not been fun at Portman Road this season and while the shot share numbers look generally above average, particularly when scores are level, the locations are far less desirable.




Ipswich have taken the fewest shots (just 30) within the dangerzone (six yard box and centrally in the 18 yard box) and sixth fewest within the 18 yard box as a whole. Instead, McCarthy’s team (as always, it seems) has been surviving on an aerial attack and stout, if not outstanding defence.


This is not necessarily a secure position to be in as a heavy aerial attack typically converts at a much lower rate. And should the goals dry up this way, it could be all too easy to get sucked in to the relegation battle.

Forest are already there however, with below average shot numbers being further hurt by below average shooting and save percentages. Their numbers are slightly more encouraging at level score game states but they are not able to maintain this when leading.

And although the attacking shot locations are generally mid table, they have conceded more six yard box shots than any other team (11) – the only side to hit double figures in this regard.

There are several sides worse than Forest, but the problem is they already have a head start and life can seem so much harder when you are already staring the relegation zone in the face.

Leeds vs Newcastle


The Champions-elect (yes, I said it) visit one of the surprise packages of the season in the final game of the weekend.


I asked before the season if this was the best squad to ever play in the second tier of English football and the answer was generally positive. After a slow start the Magpies have now hit their stride and look a cut above everyone else.

Of course upsets, injuries etc. happen, but the gulf in class is noticeable visually and in the numbers.


Leeds are a strange one indeed and I’m at a bit of a loss to explain their current lofty playoff place perch.

After a very poor start to the season their overall 11v11 shot numbers have pretty consistently improved to at least league average, and even slightly above. Signs that Gary Monk’s system is bedding-in perhaps?


However, their shot locations are very mid-table and they’ve even spent the same amount of time winning as losing (396 minutes) with 767 minutes at tied – all almost exactly league average.

Leeds do a pretty good job of making sure that the few shots they do take make it on target and the win over Norwich was probably their most impressive statistically of the season, following wins over two much more lowly teams, Wolves and Burton.



So perhaps this is just them hitting a run of form, a sign of a fairly weak schedule so far and how close the table is – just three points separate Leeds in sixth with Preston in eleventh.

If Monk can sustain this improvement however, then they could cement a top half place and push towards the playoffs – that would be quite a turnaround from the last few years of statistical awfulness.

How they perform at home against Newcastle, and not necessarily the result, could give a decent idea of where this team is heading.


PositionTeam 11v11 Corsi 11v11 Fenwick 11v11 SoT 11v11 Goals Rate 11v11 Sh% 11v11 Sv% 11v11 PDO Points
14 Aston Villa 0.495 0.517 0.524 0.52 26.15 72.88 99.04 21
13 Barnsley 0.473 0.467 0.443 0.52 37.14 72.73 109.87 21
7 Birmingham 0.478 0.464 0.455 0.54 35.71 74.63 110.34 25
23 Blackburn 0.432 0.428 0.432 0.39 29.63 64.79 94.42 13
12 Brentford 0.489 0.492 0.507 0.58 28.38 79.17 107.55 22
2 Brighton 0.532 0.574 0.578 0.76 42.37 81.4 123.77 34
9 Bristol City 0.519 0.5 0.529 0.54 34.38 66.67 101.04 24
18 Burton 0.529 0.54 0.508 0.49 27.27 70.31 97.59 18
21 Cardiff 0.497 0.528 0.477 0.37 26.92 57.89 84.82 15
16 Derby 0.54 0.532 0.541 0.48 18.18 76.79 94.97 20
8 Fulham 0.54 0.546 0.5 0.59 37.1 74.19 111.29 24
3 Huddersfield 0.552 0.519 0.542 0.5 29.31 65.31 94.62 29
15 Ipswich 0.47 0.496 0.51 0.48 28 68.75 96.75 21
6 Leeds 0.485 0.522 0.526 0.53 31.67 68.52 100.19 26
1 Newcastle United 0.613 0.6 0.648 0.74 43.04 72.09 115.13 37
5 Norwich 0.54 0.511 0.511 0.5 38.03 60.29 98.32 27
20 Nottingham Forest 0.493 0.465 0.479 0.43 34.33 58.9 93.23 16
11 Preston 0.462 0.467 0.481 0.55 35.38 72.86 108.24 23
17 Queens Park Rangers 0.471 0.482 0.517 0.45 28.33 62.5 90.83 20
4 Reading 0.515 0.483 0.459 0.53 31.15 76.39 107.54 28
24 Rotherham 0.346 0.332 0.366 0.31 32.08 59.78 91.86 7
10 Sheffield Wednesday 0.572 0.576 0.555 0.46 22.54 66.67 89.2 24
22 Wigan 0.481 0.472 0.473 0.42 26.42 67.8 94.21 14
19 Wolverhampton Wanderers 0.512 0.523 0.504 0.39 23.44 63.49 86.93 17




Friday, 2 October 2015

Championship Week 9: New beginnings

Welcome to the 2015/16 version of The Only Statistic That Matters.
First an apology for my tardiness at putting this out but sometimes life, among other things, gets in the way.

This season I’m collecting a whole load more data which I’m still working out what to do with, what is useful and what can add value to understanding how this wonderful sport we so love works.
One of the big changes I’ve made with the data I’m tracking this year is to use 11v11 wherever possible.
I noticed last year that on occasions there seemed to be big swings in shot stats involving games with a red card (Brentford’s 41 shot mauling of Blackpool being the prime example).
In ice hockey, where many of these metrics originate, the power play/penalty kill (where one team temporarily has a player less) are separated out from full strength (5v5 in that case) play.
Yes, it will make for a smaller sample size, but I’m hoping the sample I’m left with will be more accurate as to the real skills of the Championship teams.

The good point about starting coverage at this stage in the season is that many of the metrics have started to settle down – at least they were doing so at this time last season.
We are still dealing with a small sample size in terms of shots though.
The average team will have taken (and conceded) 118 shots so far, meaning a couple of goals here or freak deflections there can still make all the difference in the table and in the numbers.

I’m also recording where the shots are being taken from, at least in broad geographic on-pitch locations.
These are the standard ones that I’m sure many of you will be familiar with already, but just for clarification we have: inside the six yard box, the central area of the 18 yard box immediately in front of the six yard box, the sides of the 18 yard box, and outside the 18 yard box.
The six yard box and area in front of it collectively being the Danger Zone.
Headers are being recorded separately from shots: inside the six yard box and outside (the vast majority of these take place in the central 18 yard box area so there seems little point in also using the sides).

Season so far

So now that’s cleared up, or at least some of it, let’s have a look at where we are so far.

Pos Team Played Won Drawn Lost For Against Goal Diff Points
1 Brighton 9 6 3 0 13 7 6 21
2 Middlesbrough 9 6 2 1 17 5 12 20
3 Reading 9 4 3 2 14 7 7 15
4 Hull 9 4 3 2 12 7 5 15
5 Birmingham 9 4 3 2 14 10 4 15
6 Cardiff 9 4 3 2 13 10 3 15
7 Burnley 9 4 3 2 12 10 2 15
8 Ipswich 9 4 3 2 15 15 0 15
9 Derby 9 3 5 1 10 7 3 14
10 Wolves 9 3 3 3 12 11 1 12
11 Nott'm Forest 9 3 3 3 9 9 0 12
12 Sheffield Weds 9 3 3 3 12 13 -1 12
13 QPR 9 3 3 3 14 17 -3 12
14 Fulham 9 3 2 4 15 14 1 11
15 Leeds 9 2 5 2 9 11 -2 11
16 Huddersfield 9 2 4 3 10 11 -1 10
17 Charlton 9 2 3 4 9 12 -3 9
18 Blackburn 9 1 5 3 10 10 0 8
19 Brentford 9 2 2 5 12 17 -5 8
20 Rotherham 9 2 2 5 11 17 -6 8
21 Bolton 9 1 5 3 6 12 -6 8
22 Preston 9 1 4 4 6 10 -4 7
23 Milton Keynes Dons 9 2 1 6 8 13 -5 7
24 Bristol City 9 1 3 5 11 19 -8 6


Middlesbrough being in the promotion spots will not be a surprise to many. Brighton being top probably will be, but shouldn’t be. I was cautiously optimistic about the Seagulls before this season given their very good shot metrics last year.
With very good shot numbers again it seems this season they’re actually scoring and saving shots that last year they should have been.
At the other end, I had much higher (mid-table) hopes for at least two of the promoted teams.
But while it may make pretty grim viewing for the trio right now, as we’ll see shortly, only MK Dons are making a particularly bad start, with Preston and Bristol City bitten by horrible luck and variance in and in front of goal.

For the eagle-eyed among you, Reading  (0.681 shot share, 97.78 PDO) and Middlesbrough (0.530 shot share, 126.38 PDO) do not fit on the chart.

Again, Reading  (0.714 shot share, 97.78 PDO) and Middlesbrough (0.531 shot share, 126.38 PDO) do not fit on the chart.


Shooting stars

The early statistical stars of the season are without doubt Reading.
They started off at around an 80% shot share but that was never going to be sustainable and are now in the region of 68-72%, depending on which flavour of metric you prefer.
The secret of this is defence.
The Royals have conceded just 67 total shots – almost half the league average.
And while doing that, they’ve also been very nicely above average at taking shots (137, 3rd best).
That is quite simply superb.
There may be other reasons for this such as the fixture schedule so far, but they have played (and outplayed) Burnley and Ipswich, while they matched Derby in shots despite being down to ten men for half the game.
In fact, Ipswich (in that memorable Friday night hammering) are the only team to reach double figures in shots taken at 11v11 and are the only team to out shoot Reading.
I suspect much of that was due to the massive score difference leading to Reading sitting back.
So certainly at the moment, Reading look like legitimate promotion contenders.
There is still a long way to go, but boy do the early stats make positive reading.


Rotherham

Somewhat lost amid the row about a certain West London team was the news that Steve Evans left (by one method or another) the manager’s post at Rotherham United.
While his personality can rub people the wrong way, last season he did a fine job keeping the small budget Millers up and it was only a horrible PDO score that saw them slide towards the relegation zone.
Their shot metrics were give or take mid-table obscurity.

Unfortunately for Evans, in the summer he was forced to sell some key players without being able to replace them sufficiently and the results this year have been rather ugly.
Rotherham are bottom in overall 11v11 shot share (taking just 43.3% of all shots in their games), second bottom in unblocked shot share (again 43.3%) and third bottom in shots on target share (40.7%).
Getting burned a bit by PDO as well (93.94) meant there was nowhere to hide and so Evans left the club.
Perhaps the real killer for Rotherham has been the quality of shots taken by opponents.
The Millers have conceded 40 danger zone shots (most) including nine from within the six yard box.
The next worst teams have only conceded six close in, with the average being three and a combined 25 from the six yard box and danger zone respectively.

Whether anyone else will be able to improve performances given the talent drain at the club it will be tough to do, but I’d suggest they look at the defensive side of things first.


Let’s talk about Brentford


Well nobody else is, so I may as well give the developments at Griffin Park a bit of coverage, eh?
I had actually really hoped to give Brentford a wide-ish berth this season and just let the club get on with what they are doing and see how it goes.
I had not expected to be writing about sacking the manager in my first post this early in the season.
There's been a lot of heat and not much light in the comments that I've seen about the Brentford situation this week. Hopefully this will add some much needed light to the discussion.

Like just about everyone else in the world I have very little idea of the exact reasons why Marinus Dijkuizen was sacked on Monday.
But it seems fair to look at the numbers and see what’s been going-on on the pitch.
And the numbers do not make great viewing.

At the time of Dijkuzien’s sacking, while the all situations metrics looked just below average, these were buoyed by a positive piece of play when up a man against Bristol City.
In 11v11 it was not pretty. In the bottom eight in both overall shot share and unblocked shot share (47.4% and 45.4%), the Bees were third worst in the Championship with a shots on target share of just 39.7%.
That is a quite remarkable turnaround from last season.
When we look down into the raw shot numbers there seems to be a likely dearth of quality scoring chances.
Although there were 27 shots taken centrally in the 18 yard box (above the 22 average at the time), there was just one solitary shot form inside the six yard box. And no headers from inside the six yard box too.
While not damning, those numbers are not exactly warm and fuzzy either.

However, if we look at the shot shares when scores are level in the game, this makes a bad situation look even worse.


Pretty horrific yeah?
Taking 40% (or even worse just 30%) of shots when the score is tied is an awful position to start a game from.
Yes, the PDO score is kind of bad as well, but a team would need a mammoth PDO up around 120 to be surviving that kind of shots performance.
As a result, by the completion of week eight, Brentford had spent as much time at one goal down as they had at level scores.

I cannot say with anything other than guess work that these are the sorts of figures the management team at Brentford would be using to make the decision, but it seems a likely path.
Brentford were not in their lowly position by an awful run of bad luck. This league position was not a quirk of fate. Shots-wise at least, it was fully deserved.

And although it may make some fans or media happy to see the experiment with analytics in Griffin Park apparently fail so quickly, that Dijkuzien was let go at this early point probably says loud enough that there was a realisation that his role and input was not working out.
That is what the analytics should be doing; helping make informed decisions at the appropriate time without reacting to isolated events.
Tuesday’s home defeat by Birmingham was another shots horror show, so it will be interesting to see how Lee Carsley beds-in and if he can turn this poor start around.



Monday, 3 November 2014

Championship Week 15: Bournemouth soar, Forest slide, Lee Clark's awfulness


So it's been a hectic few weeks in the Championship (and for me) with quite a few changes at the top end and just two notable ones at the bottom end.
Looking at the top we see Watford now top three points clear of Bournemouth, Middlesbrough and Wolves.
The biggest surprise there is obviously the south coast team, but as we'll see in a bit, the Cherries deserve the lofty perch.


Position Team Played Won Drawn Lost Goals For Goals Against Goal Difference Points
1 Watford 15 8 5 2 29 16 13 29
2 Bournemouth 15 8 3 4 31 16 15 27
3 Middlesbrough 15 8 3 4 22 12 10 27
4 Wolves 15 7 6 2 21 15 6 27
5 Derby 15 7 5 3 25 14 11 26
6 Norwich 15 7 5 3 24 13 11 26
7 Blackburn 15 7 4 4 24 21 3 25
8 Ipswich 15 6 6 3 22 16 6 24
9 Charlton 15 5 8 2 17 16 1 23
10 Nott'm Forest 15 5 7 3 23 19 4 22
11 Cardiff 15 6 4 5 21 18 3 22
12 Brentford 15 6 4 5 18 20 -2 22
13 Sheffield Weds 15 4 8 3 12 12 0 20
14 Huddersfield 15 5 5 5 22 25 -3 20
15 Reading 15 5 3 7 19 26 -7 18
16 Millwall 15 4 5 6 15 19 -4 17
17 Rotherham 15 4 5 6 15 21 -6 17
18 Wigan 15 3 7 5 17 18 -1 16
19 Leeds 15 4 4 7 15 21 -6 16
20 Fulham 15 4 3 8 22 28 -6 15
21 Brighton 15 2 7 6 15 19 -4 13
22 Birmingham 15 2 6 7 12 28 -16 12
23 Bolton 15 3 2 10 14 26 -12 11
24 Blackpool 15 1 3 11 8 24 -16 6

Cherry picking stats

I've watched a few Bournemouth games of late and have to say that I've really enjoyed them - something relayed by their stats.
The Cherries are sixth in total shots taken and third in shots on target. Combine that with a very solid defensive record and their underlying stats are really good - fourth in total shot share (Corsi/TSR) and an even more impressive third in shots on target share with more than 60% on average.
And this has been a season-long trend - SoT share has never been below 56%, while since week three the overall shot share has remained above 50%.

Week 10 was their most recent low point of the season so far when they hit 15th place - by no coincidence this was when they had a PDO of just 92.86.
Since then that has regressed back up and now sits above average at 107.88. But even as and when Bournemouth's PDO drops back a little, it's still very easy to see Eddie Howe's side challenging for promotion.


Position Team Shots for total Shots against total Corsi/TSR
22 Birmingham 200 263 0.432
7 Blackburn 245 215 0.533
24 Blackpool 168 229 0.423
23 Bolton 194 244 0.443
2 Bournemouth 229 185 0.553
12 Brentford 189 220 0.462
21 Brighton 243 163 0.598
11 Cardiff 173 228 0.431
9 Charlton 154 227 0.404
5 Derby 208 197 0.514
20 Fulham 194 206 0.485
14 Huddersfield 212 217 0.494
8 Ipswich 202 218 0.481
19 Leeds 147 245 0.375
3 Middlesbrough 238 150 0.613
16 Millwall 207 177 0.539
6 Norwich 268 147 0.646
10 Nott'm Forest 208 193 0.519
15 Reading 188 202 0.482
17 Rotherham 215 220 0.494
13 Sheffield Weds 196 178 0.524
1 Watford 213 231 0.48
18 Wigan 189 169 0.528
4 Wolves 232 188 0.553


Forest's autumn fall

Taking the reverse path to Bournemouth has been Nottingham Forest.
I mentioned a few weeks back that Forest's position atop the division looked rather fragile and so it is proving to be.
Forest are doing this PDO cold turkey in one long hard dose.
From being joint top at week 11 with a PDO of 122.26, Forest are now tenth, having picked up just one point in four games with a PDO of 108.31.
So there's still a little way to go potentially for Stuart Pearce's side.


Position Team shots on target for total shots on target against total Shots on target share
22 Birmingham 54 90 0.375
7 Blackburn 83 70 0.542
24 Blackpool 48 69 0.41
23 Bolton 60 86 0.411
2 Bournemouth 85 56 0.603
12 Brentford 68 71 0.489
21 Brighton 62 48 0.564
11 Cardiff 57 54 0.514
9 Charlton 46 65 0.415
5 Derby 71 71 0.5
20 Fulham 68 65 0.511
14 Huddersfield 78 72 0.52
8 Ipswich 63 64 0.496
19 Leeds 43 81 0.347
3 Middlesbrough 68 39 0.636
16 Millwall 63 58 0.521
6 Norwich 81 48 0.628
10 Nott'm Forest 62 66 0.484
15 Reading 55 64 0.462
17 Rotherham 68 67 0.504
13 Sheffield Weds 51 51 0.5
1 Watford 76 64 0.543
18 Wigan 53 59 0.473
4 Wolves 71 56 0.559


More worryingly though, Forest's total shot share has barely hovered above 50% and the shots on target share has actually dipped to below 50% and now sits at just 48%.
Maintain those numbers and Forest's promotion hopes will likely be extinct.
I've not watched much of Forest this season, so it would be interesting to know if this hard patch has seen Pearce change his tactics and hence the drop in shot shares.
If not, then perhaps he needs to. Or perhaps it is something more simple such as coming across a tough part of the fixture list.



Position Team Shooting % For Save % PDO
22 Birmingham 22.23 68.88 91.11
7 Blackburn 28.92 69.99 98.91
24 Blackpool 16.67 65.22 81.89
23 Bolton 23.34 69.78 93.11
2 Bournemouth 36.46 71.42 107.88
12 Brentford 26.47 71.84 98.3
21 Brighton 24.2 60.43 84.63
11 Cardiff 36.85 66.66 103.51
9 Charlton 36.94 75.38 112.32
5 Derby 35.21 80.28 115.48
20 Fulham 32.36 56.91 89.27
14 Huddersfield 28.21 65.29 93.5
8 Ipswich 34.91 75 109.91
19 Leeds 34.89 74.07 108.95
3 Middlesbrough 32.35 69.23 101.58
16 Millwall 23.81 67.24 91.06
6 Norwich 29.63 72.91 102.54
10 Nott'm Forest 37.08 71.22 108.31
15 Reading 34.55 59.38 93.93
17 Rotherham 22.06 68.66 90.72
13 Sheffield Weds 23.52 76.48 100
1 Watford 38.16 75 113.16
18 Wigan 32.08 69.5 101.58
4 Wolves 29.57 73.21 102.78


Lee Clark... just wow 

Finally - Birmingham.
I'm frankly amazed Lee Clark lasted as long as he did - it's shocking how much time a last day last minute escape can buy you. It took, of course, a PDO dip to get him sacked, but a PDO boost saved him earlier this season too.
Yes, we are still dealing in small sample sizes, but last season's statistal poor showing (and near-relegation scare) should have been ample warning.
To put the full horror of Clark's team into persepective - Birmingham has not had a corsi/TSR score of more than 46% (46.4% to be exact) all season and the shots on target performance is even worse.
The high point here is 41.7% - a full TWO THIRDS of the season has been spent with a shots on target share of LESS than 40%.
It really is horrific.
Yes, it's very apparent that there are other (bigger) problems at Birmingham, but unless Gary Rowett can really improve things (or they get a massive PDO boost) then Blues will be getting relegated.



Position Team Corsi/TSR Shots on target share PDO
22 Birmingham 0.432 0.375 91.11
7 Blackburn 0.533 0.542 98.91
24 Blackpool 0.423 0.41 81.89
23 Bolton 0.443 0.411 93.11
2 Bournemouth 0.553 0.603 107.88
12 Brentford 0.462 0.489 98.3
21 Brighton 0.598 0.564 84.63
11 Cardiff 0.431 0.514 103.51
9 Charlton 0.404 0.415 112.32
5 Derby 0.514 0.5 115.48
20 Fulham 0.485 0.511 89.27
14 Huddersfield 0.494 0.52 93.5
8 Ipswich 0.481 0.496 109.91
19 Leeds 0.375 0.347 108.95
3 Middlesbrough 0.613 0.636 101.58
16 Millwall 0.539 0.521 91.06
6 Norwich 0.646 0.628 102.54
10 Nott'm Forest 0.519 0.484 108.31
15 Reading 0.482 0.462 93.93
17 Rotherham 0.494 0.504 90.72
13 Sheffield Weds 0.524 0.5 100
1 Watford 0.48 0.543 113.16
18 Wigan 0.528 0.473 101.58
4 Wolves 0.553 0.559 102.78


PS - Poor Blackpool (again).
Having the aforementioned Lee Clark thrust upon you may be too much for one fan base to take.

Blackpool started off the first seven games with reasonable (given their position) shot share and shots on target share numbers - c 48% and 44% respectively.
But since then it's been all downhill.


PPS - I really hope Brighton's god-awful PDO (luck, variance, however you wish to describe it) turns soon.
The underlying numbers are just too good to ignore or all be down to score effects.
The Seagulls are still up at around 60% of all shots and have just started to dip slightly with shots on target share, but still boast a heafty 56.4% share there.
Saturday night's game may have summed up their season so far - competing hard going toe-to-toe with an aggressive attacking team and then one stupid error giving up a penalty, and thus the losing goal.
Credit to Brighton's fans and ownership for sticking by Hyypia - I hope their loyalty is paid back by the footballing gods soon.


Friday, 17 October 2014

Championship Week 11: The quarter mile post

So having played 11 games and reached its second international break the Championship season is now basically a quarter of the way through.
So it seems an appropriate time to start looking at some of the league-wide trends and some new graphs for me.

First up, as always, is the real life table after those 11 matches.

Position Team Played Won Drawn Lost Goals For Goals Against Goal Difference Points
1 Norwich 11 6 3 2 21 10 11 21
2 Nott'm Forest 11 5 6 0 19 9 10 21
3 Watford 11 6 3 2 20 12 8 21
4 Derby 11 5 5 1 19 10 9 20
5 Middlesbrough 11 6 2 3 16 8 8 20
6 Ipswich 11 5 4 2 16 10 6 19
7 Charlton 11 4 7 0 14 10 4 19
8 Wolves 11 5 4 2 14 11 3 19
9 Sheffield Weds 11 4 5 2 11 8 3 17
10 Brentford 11 5 2 4 15 16 -1 17
11 Bournemouth 11 4 3 4 16 14 2 15
12 Blackburn 11 4 3 4 16 18 -2 15
13 Reading 11 4 3 4 15 17 -2 15
14 Leeds 11 4 3 4 11 13 -2 15
15 Cardiff 11 3 4 4 13 14 -1 13
16 Millwall 11 3 3 5 10 13 -3 12
17 Rotherham 11 3 3 5 9 13 -4 12
18 Huddersfield 11 3 3 5 12 20 -8 12
19 Brighton 11 2 5 4 10 12 -2 11
20 Birmingham 11 2 5 4 12 18 -6 11
21 Wigan 11 2 4 5 12 14 -2 10
22 Fulham 11 2 1 8 12 22 -10 7
23 Blackpool 11 1 3 7 6 14 -8 6
24 Bolton 11 1 2 8 8 21 -13 5

Norwich are sitting nicely top of the tree and their underlying stats back up that position very nicely indeed.
At the bottom we have Bolton and Blackpool, both with some horrible numbers but also, as we’ve been seeing, affected by awful luck (PDO) as well.
Fulham’s recent run of form has is genuinely deserved and were it not for having the second worst PDO score in the league the west London side would be very comfortably in mid-table.

I think it’d be quite nice to see what forces are driving the bus in terms of teams overall performance so far. Being a quarter of the way in to a seas you would hope that we are starting to see some performance (as opposed to luck) –based trends developing. But its still only 11 games in – by scientific principles still quite a small sample size.
So first thing I’m going to do is compare league points accumulated so far against shot share (Corsi/TSR).

What we’re looking for is an R2 value close to 1 (a complete positive correlation) or -1 ( a completely negative correlation). Anything around 0 means, well, its worth about 0.



As you can see, there’s barely any link at all between how teams are controlling play in general and how many points they have accumulated. An R2 value of basically 0.1 is pretty weak to say the least.

So let’s try doing the same only using shots on target share instead.




This looks a bit more encouraging, although it really isn’t strong enough to say that this measure has a massive baring on the results teams are seeing so far.

In that case, let’s have a look at PDO vs points won.





Well helllloooooo!
Compared to the other two that is pretty damn high.
Again it’s not a perfect match, but what it serves to show us is that at the moment points won and hence league position are still being dominated by luck factors.
Hopefully, as we follow the season through, this score will reduce and the shot share and sots on target share will increase. (Hopefully!)

So if we do see a regression back to the mean (of 100) of PDO scores, how can we expect the season to play out if teams keep performing as they are?
Well, being as it has a slightly stronger link to points at the moment, lets look at shots on target share vs PDO to see where our teams are.





The top two (Norwich and Forest) are green coloured dots, the four play-off teams are yellow, the three in the relegation zone are red, and the rest are blue.

There are a couple of very noticeable points that are due some regression one way or another.
First is the very top one – Forest.
With a very average share of the shots on target and a sky high PDO, Forest seem due for a fall down the league when the luck runs out.
Already we’re seeing some disquiet among Forest fans as the club has hit a dry spell in front of goal. It could get much worse for the early leaders.

In an opposite position is Brighton.
Having a great share of the shots on target but rotten luck, it’s just a question of how long Sami Hyypia can remain in charge at the Amex to benefit from the regression.
Once that kicks in, assuming these good underlying numbers are not purely due to score effects (or some horrible tactical inefficiency at one end or the other), the Seagulls could well race up the table.
And if they’re not too far off by then, even make a challenge for the playoffs or promotion.

In the left side of the graph we have the teams that are struggling.
As I mentioned earlier, despite the recent upturn in results Fulham are still being hit by brutal luck. Once that begins to reverse the west London side should be fine.

Looking on the good luck side of the x-axis, the two teams most in danger of joining Bolton and Blackpool are Leeds and Wigan.
Remarkably similar underlying numbers but Leeds managed to scrape a few more points together.
A sharp turnaround is needed in performance or this pair is going to find themselves sucked into a relegation battle shortly.

And teetering on the precipice is Birmingham.
Getting just 40% of the shots on target with a dead even PDO score (the only team in the league to do so), it’s safe to say that the Blues are right where they deserve to be.
It’s a relegation fight that could go right down to the wire again for them.


Too hot

There are a few fascinating games (statistically speaking) this weekend in the Championship.
Number one for me is down at the Amex where Brighton and Middlesbrough face-off.
Two teams that love controlling possession and a few weeks ago were both suffering the pain of harsh PDO.
Middlesbrough has since recovered, when will Brighton?
That should be a good one.


Too cold




Then comes the match at St Andrews and two teams with the opposite problem – neither one can control a game if its life depended on it.
This could be interesting for other reasons. Along with the obvious impact at the bottom of the table, it’s Neil Lennon’s first game in charge for Bolton.
Will Wanderers be lifted by this? Will Lennon’s tactics bring an improved performance?
And will Birmingham get sucked in to the relegation mire?
Of course a win for Birmingham brings them some much needed breathing space and would be a real blow to Bolton.
And surely someone has to get a shot on target!


Just right

Finally from my highlight trio is Cardiff vs Forest.
Looking at the table this seems a real mis-match, but going by shots on target share, this could be a very close game.
Both teams are basically at 50% of the shots on target share each game.
Forest have by far the stronger overall shot share (Corsi/TSR) numbers, but there’s very little difference when it comes to getting shots on goal.
And this of course will be Russell Slade’s first game in charge at the CCS – taking over after a particularly listless performance at Blackpool.
Does Forest’s PDO regression start in south Wales?



Dear Bill,

As an aside (or maybe rant is better), I’ve not done any graphs and charts work on Excel in a long time… like more than a decade ago when doing my degree, so this post has involved a lot of re-familiarising myself with that.
Or in fact, re-learning. Because Microsoft seems to have taken what was a relatively simple process in those earlier versions of Excel, and twisted it to become ridiculously complicated instead.
This to me feels like the sort of thing you have to intend to do, to make it that awkward. But still, I guess you learn something new everyday!