Arsene Wenger has made one change to the team that beat Sunderland in the Premier League on Saturday for tonight's trip to Marseille in the Champions League.
Per Mertesacker is available again and returns to the team in place of Carl Jenkinson.
That means that Bacary Sagna reverts to right back, with Kieran Gibbs deployed on the opposite flank and Carl Jenkinson dropping to the bench.
Mesut Ozil also starts and will provide support for Olivier Giroud in attack.
Elsewhere, Thomas Vermaelen is named on the bench along with youngsters Chuba Akpom and Isaac Hayden.
Team in full: Szczesny, Sagna, Mertesacker, Koscielny, Gibbs, Flamini, Ramsey, Wilshere, Ozil, Walcott, Giroud.
Subs: Fabianski, Vermaelen, Monreal, Jenkinson, Hayden, Ryo, Akpom.
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