Arsenal defender Mikael Silvestre will be out for three weeks following an injury to his thigh at the weekend.
The Frenchman lasted just 30 minutes against Plymouth at the weekend in the FA Cup before limping off.
This isn't the only injury problem Arsenal face at the moment, with Arsene Wenger saying, "I have to look at it but at the moment
with the injuries we are a little bit short everywhere. I hope Kolo
will not be out for a very long time because he has an inflamed groin.
"On the left-hand side we are a bit short but Gael Clichy should be back for next week."