Arsenal v Olympiacos preview

Team news ahead of Arsenal's Champions League Group F showdown with Olympiacos at Emirates Stadium on Wednesday evening. Arsenal will be without England winger Theo Walcott (knee), centre-back Laurent Koscielny (ankle) and forward Gervinho (hamstring) for the game. Midfielder Yossi Benayoun (thigh) and centre-back Johan Djourou (hamstring) remain out. Midfielders Jack Wilshere, Abou Diaby and defender Thomas Vermaelen continue their rehabilitation from ankle injuries. Arsenal (from): Szczesny, Sagna, Mertesacker, Song, Gibbs, Rosicky, Arteta, Ramsey, Frimpong, Arshavin, Van Persie, Fabianski, Chamakh, Coquelin, Oxlade-Chamberlain, Santos, Jenkinson, Miquel, Miyaichi.