Arsene Wenger's side are in severe danger of failing to reach the knockout stages for the first time in 16 years after two dismal defeats.
The Gunners were beaten at Dinamo Zagreb and then suffered the embarrassment of losing at home to Olympiakos, leaving them pointless at the bottom of Group F.
Another loss when Bayern visit the Emirates Stadium would put Arsenal on the verge of a stunning exit and, with so much on the line, the German champions' imperious form this season makes facing them even more daunting opponents.
