Arsenal kick off against Olympiakos on Wednesday in what promises to be an extremely eventful match in the Champions League group stages.

Arsenal’s start to their Champions League season has been exciting, but there has still been doubts and niggles, not least of which is the loss of Abou Diaby. The midfielder has picked up a thigh strain that will keep him out of action for at least two weeks. Gunners boss Arsene Wenger spoke out and said that “it was a mistake to play Diaby in the international qualifiers back in September” resting on the firm case that this injury-prone player needs rest, and quite a lot of it.

Diaby will be missed in the Champions League game, but Arsenal are by no means caught short for midfielders, with Mikel Arteta, Santi Cazorla, Aaron Ramsey, Alex Oxlade-Chamberlain and with Jack Wilshere returning from injury, although Diaby will be missed, this loss won’t be disastrous to the hopeful campaign of the Gunners.

It is unknown whether Arsenal’s newest Frenchman will start on the pitch tonight, but the pressure is surely beginning to weigh down on Olivier Giroud after he’s admitted he is unhappy with the start to his Arsenal career. Wenger continues to back Giroud, considering the striker carried Montpellier to their first French title in 2011-2012.

Arsenal were successful in their first Champions League match, as the Gunners held off Montpellier at La Mosson on Sept. 18, 2-1.