Some stats, based on all games this season:

Arsenal have won every single game in which Koscielny has not played. When he has played, we’ve won only 41% of games. Compare this to Fabregas – when he’s played we’ve won 61% of games.

When Fabianski has played, we’ve lost 28% of our games. when Szczesny has played, we’ve lost just 18%. The only player with a worse percentage of games lost when played is Diaby, at 19%.

The player with the highest percentage of games won when they’ve played is… Eboue (!?!) with a massive 75%. We’ve won only 45% of our games this season when Sagna has started.  Furthermore, we’ve won 80% of the games in which Sagna didn’t feature [but I don't think he would have given THAT penalty away... ]

Our average points per game is 1.82 this season. With Djourou playing, we’ve got an average of 2.31 points per game; Squillaci playing – 1.79 points per game; Koscielny playing – just 1.59 points per game.

With Djourou NOT playing, we’ve come away with 1.59 points on average; with Squillaci out, 2.00 average points per game; and Koscielny out, 3.00 average points per game.

Looking at the average number of goals per game for and against does not make for better reading for Koscielny – quite the opposite, it’s even worse. Taking the team as a whole, we’ve scored on average 1.82 goals and conceded 1.04 in each game this season. With the Frolish centre-half, we’ve scored marginally fewer at an average of 1.81, but conceded more with an average of 1.22. That might not sound like a lot, but we’re conceding 18% more goals with him on the pitch. It’s without him that the real difference is shown: we’ve scored a whopping 2.57 and conceded just 0.43. That’s a massive difference. It’s almost like the stats breathe a sigh of relief when he’s off the pitch.

That’s what you might call damning.