​Wenger upset by poor defensive performance against Bayern

But goalkeeper Cech, whose last appearance at the Allianz Arena saw him lift the Champions League trophy as Chelsea beat Bayern on penalties, reckons everything is still to play for.

An unlikely Olympiakos win would also eliminate Arsenal, who can not finish above Bayern due to their head-to-head record with the German champions.

That was not to be the case.

Mesut Ozil had a goal ruled out for handball between those efforts and David Alaba scored one and made another for Arjen Robben either side of half-time.

It did not take long for the hosts to score again as Mueller drilled in his third goal of the campaign on the half hour.

“We should not forget that Arsenal fielded a side similar to that of ours last season”, Guardiola added, referring to Bayern’s struggles with injury towards the end of last term.

“This was not the result we wanted against Bayern but the situation in our group doesn’t change in that we would still have had to win in Greece”.

Thanks to a late Olympiakos victor against Dynamo Zagreb, Arsenal now need the Greek side to lose in Munich in a fortnight for them to stand any chance of getting out of the group.

Group leaders Bayern and second place Olympiacos are now tied with nine points each, as qualification for the pair is looking likely with only two fixtures left to play. If we play like this we are going nowhere. “We’ve been through even more hard periods, so it’s not over”.

Arsenal will rely on Bayern to beat Olympiakos in the next round of ties and Pep Guardiola, the Bayern manager, reassured them that they would give everything to do so.

“There is a small chance but it is a real one and we have to realise that if we put in a performance like we did today our chances are at a minimum”, Wenger said.

Only goal difference is keeping Arsenal behind leaders Manchester City heading into the derby and Cech knows the players can not go into that game still thinking about their humbling defeat in Germany.

Arsenal, which has qualified for the knockout stage of the Champions League in each of the past 15 seasons, is now hanging on by a thread.

Bayern demonstrated their attacking riches by throwing on Holland winger Robben early in the second half, and he struck their fourth with his first touch, turning Alaba’s cutback into the roof of the net.