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Wednesday 7 September 2011

You'll Never beat Stoke City.

These thoughts were initially intended to for part of the piece on Stoke City's uncommonly excellent hidden stats,but that article grew too large,so it gets a small post of it's own.

The first table charts how efficient the visiting teams are at turning shots on target into goals for every Premiership team over the last 6 seasons.The quality of the strikeforce faced by the home defence is on average going to be of a similar quality for each team.Constant members of the EPL over the time span will have faced virtually identical calibres of attacks,the only attack they won't have faced but others will are obviously their own.Therefore,the conversion rate that  the home team sees for it's opponents shots will be largely dependent upon their ability to defend on target shots.

This ability will be down to the goalkeepers,but a significant proportion of the credit should also be given to the overall defensive capability of the team.If an attacker has time and space to shoot his shot will likely be more accurately aimed away from the keeper and more powerful.If he's being quickly shutdown by defenders,then the quality of his on target shot will suffer,making them easier to save.

Once again Man U top the list.Visitors to Old Trafford converted shots at the lowest rate,but the second most difficult ground to convert on target chances into goals was the Britannia Stadium.Stoke concede proportionally more on target shots than United,but accepting that,they are the second most technically gifted side in the Premiership at dealing with each individual shot.This skill can be quantified in terms of extra points per season gained for this talent.If Stoke were an averagely talented shotstopping side they would have been expected to concede about 71 goals from the 355 on target shots they faced at the Brit instead of the 54 goals they did allow.So together their keepers and defensive players "saved" the side 17 extra goals over three seasons.That equates on average to 3 tenths of a goal for every home game,which in turn is worth 0.2 extra league points per home game or almost 4 extra league points over a seasons worth of games.

Your first option to prevent goals is to stop teams having shots on target,but to do this you have to have the league's best,and therefore most expensive players on your side.If like Stoke you are working on a extremely limited budget by comparison with the top sides,you have to deal with the greater number of shots you face as well as you can.And that's clearly what they do.

Goals Scored to Shots On Target Ratio for Visitors to Premiership Grounds over the Last 6 Seasons. 

Home Side. Shots on Target by Away Side. Goals Scored by Away Side. Conversion
Rate.
MAN UTD. 508 64 0.126
STOKE. 355 54 0.152
ASTON VILLA. 672 113 0.168
BIRMINGHAM. 453 78 0.172
CHARLTON. 238 41 0.172
CHELSEA. 417 73 0.175
TOTTENHAM. 621 113 0.182
BLACKBURN. 657 120 0.183
BOLTON. 706 130 0.184
MAN CITY. 573 106 0.185
LIVERPOOL. 383 71 0.185
READING. 238 45 0.189
EVERTON. 639 121 0.189
ARSENAL. 444 88 0.198
WOLVES 251 50 0.199
FULHAM. 614 124 0.202
WEST HAM. 769 157 0.204
NEWCASTLE. 565 117 0.207
BURNLEY. 142 30 0.211
PORTSMOUTH. 523 114 0.218
MIDDLESBRO' 441 97 0.220
SUNDERLAND 588 130 0.221
WATFORD. 106 25 0.236
BLACKPOOL. 152 37 0.243
HULL. 256 65 0.254
WIGAN. 589 150 0.255
WEST BROM. 346 89 0.257
SHEFFIELD
UTD.
80 21 0.263
DERBY. 139 43 0.309

The table for teams when they are away also features Man Utd near the top,so they can be confident choices as the most effective team overall at dealing with shot on target.Stoke pitch in at 4th spot,they're not quite as impressive on their travels,but they still gain about 2 extra league points by virtue of their shot saving abilities compared to an average road side.


Goals Scored to Shots On Target Ratio for Home Teams Entertaining Specific Sides over the Last 6 Seasons. 


Away Side.  Shots
on Target  by Home Side.
 Goals
Scored by Home side.
Conversion
Rate.
CHELSEA. 583 89 0.153
MAN UTD. 659 109 0.165
EVERTON. 768 129 0.168
STOKE . 509 98 0.193
BLACKPOOL. 201 41 0.204
ASTON VILLA. 884 181 0.205
MIDDLESBRO' 586 120 0.205
WEST HAM 912 188 0.206
LIVERPOOL. 552 116 0.210
HULL. 351 74 0.211
FULHAM. 842 179 0.213
BIRMINGHAM. 649 139 0.214
NEWCASTLE. 714 153 0.214
TOTTENHMAM 800 172 0.215
MAN CITY 780 169 0.217
ARSENAL 607 132 0.217
PORTSMOUTH. 703 153 0.218
WOLVES. 324 71 0.219
READING. 309 68 0.220
SUNDERLAND. 745 166 0.223
WEST BROM. 493 111 0.225
BOLTON. 869 196 0.226
WATFORD. 148 34 0.230
BLACKBURN. 866 203 0.234
SHEFFIELD
UTD.
138 34 0.246
WIGAN. 801 198 0.247
CHARLTON. 296 74 0.250
DERBY. 170 46 0.271
BURNLEY. 179 52 0.291

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