Arsenal go in to tonight’s game knowing that anything less than a 2-goal win will send them packing from this year’s Champions League group stage. Ahead of the game, we bring you the official team news from the Emirates which sees Theo Walcott retunr to the line up as a winger and Olivier Giroud continue playing as the striker.

Olympiakos XI vs. Arsenal: Roberto; Elabdellaoui, Da Costa, Siovas, Masuaku; Kasami, Milivojević, Fortounis, Seba, Pardo; Ideye

Arsenal starting XI vs Olympiakos: Cech; Bellerin, Mertesacker, Koscielny, Monreal; Ramsey, Flamini; Ozil, Walcott, Campbell; Giroud