Arsene Wenger has made three changes for the Champions League clash with Galatasaray.
Mikel Arteta and Aaron Ramsey are sidelined by calf and hamstring injuries respectively while Jack Wilshere is on the bench after hurting his ankle against Tottenham on Saturday.
Into the starting line-up come Mathieu Flamini, Santi Cazorla and Alexis Sanchez.
Hector Bellerin and Joel Campbell are among the substitutes.
Arsenal team: Szczesny, Chambers, Mertesacker, Koscielny, Gibbs, Flamini, Cazorla, Ozil, Alexis, Oxlade-Chamberlain, Welbeck
Subs: Ospina, Coquelin, Bellerin, Rosicky, Wilshere, Campbell, Podolski
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