Arsenal full-back Bacary Sagna will be out for at least three weeks due to the ankle injury he suffered at Chelsea.

Sagna headed Arsenal in front at Stamford Bridge last Sunday before collecting the knock prior to Didier Drogba's double for the Blues.

The defender was forced to pull out of the France squad to face England on Wednesday night and could even be out for up to five weeks.

Gunners boss Arsene Wenger told the club's official website: "He has an ankle injury and the first news that we have is that he could be out for quite a while.