Arsenal train for Greek challenge in Champions League – in pictures

Arsenal manager Arsene Wenger observes his team as he conducts a training session on Monday for their Champions League match on Tuesday. Andy Rain / EPA

Arsenal players stretch during a team training session on Monday in London. Andy Rain / EPA

Arsenal's Theo Walcott shown in action during a training session on Monday ahead of their Champions League match against Olympiakos on Tuesday. Andy Rain / EPA

Arsenal's Per Mertesacker balances on one leg during a training session on Monday ahead of their Tuesday Champions League match. Andy Rain / EPA

Arsenal's Alex Oxlade-Chamberlain and Kieran Gibbs run drills during the team's training session on Monday in London. Olly Greenwood / AFP

Arsenal's Aaron Ramsey shown on Monday during the team training session ahead of Tuesday's Champions League match against Olympiakos. Olly Greenwood / AFP

Arsenal's Mesut Ozil trains with teammates Alexis Sanchez, centre, and Santi Cazorla, right, on Monday for their Champions League contest on Tuesday. Olly Greenwood / AFP

Arsenal goalkeeper Petr Cech shown training on Monday ahead of the team's Champions League match on Tuesday against Olympiakos. Shaun Botterill / Getty Images

er Mertesacker of Arsenal warms up during traing on Monday in London. Shaun Botterill / Getty Images

Arsenal's Francis Coquelin plays with the ball on Monday at the team's training session ahead of their Champions League match on Tuesday. John Sibley / Action Images / Reuters

Arsenal's Alexis Sanchez and teammates run drills during their training session on Monday ahead of their match against Olympiakos on Tuesday in the Champions League. Andy Rain / EPA

Images from Arsenal's training session on Monday ahead of Tuesday night's contest with Olympiakos in the Champions League. Click the arrows below to scroll through the photos.

Follow us on Twitter @NatSportUAE