Is Laurent Koscielny the key to Arsenal's defence?

The Frenchman was sent off in the 5-1 defeat to Bayern Munich

Is Laurent Koscielny the key to Arsenal's defence?

Arsenal's Laurent Koscielny (right) and Robert Lewandowski. Picture by: John Walton/EMPICS Sport

Arsenal's 10-2 aggregate loss to Bayern Munich can be split into to categories. Life with Laurent Koscielny and life without the French defender.

The Arsenal captain started both 5-1 defeats against the German champions, but he failed to end either match. In Munich, the 31-year-old left the field four minutes into the second-half with an injury. He lasted five minutes longer in the second-leg, after being sent off for a tackle on Robert Lewandowski.

In his time on the pitch, Arsenal only conceded once, and nine times without Koscielny.

Arsenal collapsed as the French defender's red card, but manager Arsene Wenger was not impressed with the performance of Greek referee Tasos Sidiropoulos.

"It leaves me very angry, very frustrated and I think that at the moment, because we are in a difficult period also", Wenger said post-match. "I think it’s absolutely unexplainable and scandalous that you can look what happened really that the guy behind the line gives the penalty, on top of that the red card."

Wenger added that the team showed "spirit and pride" in defeat, despite conceding five second-half goals, including three in the last 12 minutes.