Arsenal boss Arsene Wenger is disappointed to have lost William Gallas for the rest of the season due to knee injury.
Wenger said: "It is not the best news for Gallas. He's a quick recoverer but we think it will be too short to come back before the end of the season. It is a big blow but the squad comes in.
"We are on a strong run in the league and want to keep the run going. We did that even without the injured players. We have improved as a team and shown mental strength.
"We want just to focus on the short term and not look back too much."