's Nick Teale uses the BettorLogic form lab to analyse this weekend's game.

Arsenal host Wigan Athletic on Saturday as the Gunners look to get back to winning ways in the Premier League.
The Latics have won two of their five league games so far, picking up three points against Aston Villa and West Ham.
But the Lancashire side haven't registered a victory against a 'Big Four' team since their return to the Premier League five seasons ago. So Roberto Martinez will need all his players to be on top of their game on Saturday afternoon.
Looking at the Bettorlogic stats this week, Mario Melchiot appears to be the key man in Wigan's defence when they play against the 'Big Four'.
With Melchiot in the side, Wigan concede an average of 1.79 goals per game. However, when the former Chelsea centre-half doesn't play, they ship an average of 2.67 goals per game.
Arsenal tend to perform well at home to mid-table teams. Over the last five seasons, the Gunners have only lost six per cent of home games against such sides, picking up an average of 2.47 points per game.
Cesc Fabregas will captain Arsène Wenger's side on Saturday and the stats prove what we already suspect: Cesc is instrumental to the side.
Playing against mid-table teams this season and last, Arsenal are much stronger when Fabregas starts. When the Spaniard plays, the Gunners score an average of 2.3 goals per game. In the games he's missed, Wenger's side bagged an average of 0.89 goals per game.
Alex Song is likely to be one of Cesc's midfield partners at the weekend. When the pair play together, Arsenal's points per game average against mid-table teams is 2.5. The stats show that when either one of the pair sits out, Arsenal only collect an average of 1.91 points per game.

In defence Bacary Sagna has been a big player for Arsenal. They have only conceded eight times in the 16 games he's featured in against mid-table sides this season and last. When Sagna hasn't played, an average of 1.33 goals have been conceded.
As for the side overall, Arsenal have only lost two of the 34 home games against mid-table teams over the last five years. Away, the Gunners are defeated 29 per cent of the time.
Lets hope the 'Emirates effect' will help Arsenal to victory on Saturday.

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17 Sep 2009