By Richard Clarke 

Samir Nasri is in the Arsenal squad for the Champions League tie with Barcelona on Wednesday - but he may not start.

The French midfielder has been missing since injuring his hamstring against Huddersfield a fortnight ago. He is back quicker than expected and trained on Tuesday afternoon. However, after the session, Arsène Wenger was still cautious about re-introducing one of his most influential players this season.

“Samir is in the squad,” said the manager. “But the starting line-up will be decided tomorrow.

"He's recovered quicker than expected. I said it will be 21 days but it will be only 17 days. Everybody's absolutely adamant that he's completely medically available. It's down to me to make the decision.

"I will take no medical risk but it's good to have him in the squad.”

Elsewhere, Wenger has one midfielder out and one back.

“Rosicky is available,” said the Frenchman. “He's in the squad. But there's no Diaby. He has a calf problem. He did it with the French national squad against Brazil.”

Bacary Sagna is suspended after his sending off in Arsenal’s final Group H game against Partizan Belgrade. Emmanuel Eboue is expected to deputise at right back.

Copyright 2014 The Arsenal Football Club plc. Permission to use quotations from this article is granted subject to appropriate credit being given to www.arsenal.com as the source 15 Feb 2011