Francis Coquelin has been added to Arsenal's growing injury list, after the midfielder picked up a knee problem in the Gunners's 2-1 defeat to West Bromwich Albion on Saturday afternoon.
Coquelin was replaced by Mikel Arteta, who also went off injured after scoring an own goal and ultimately West Brom's winner.
The Gunners are without several first-team players, which includes the likes of Theo Walcott, Alex Oxlade-Chamberlain, Jack Wilshere, Aaron Ramsey and Danny Welbeck, who are all out with various injuries.
Arsene Wenger's side have several key games coming up, as the face Olympiacos and Dinamo Zagreb in the Champions League and Manchester City in the Premier League.
Coquelin has made 16 appearances in all competitions for Arsenal this season.