Arsenal could be without Emmanuel Eboue for several weeks after he was stretchered off with a knee ligament injury in the 1-0 win over Chelsea.
Eboue was stretchered off at the Emirates
Eboue faces a spell on the sidelines after he came off worse in a 69th-minute collision with Joe Cole.
"It's a medial ligament injury," said Arsenal boss Arsene Wenger. "We will see in the next 48 hours but it looks as if he will be out for a while."
Eboue is set to miss Tuesday's Carling Cup quarter-final at Blackburn.