Arsenal midfielder Mikel Arteta admits they're failing to live up to fans' expectations.

Arteta was frustrated that Arsenal gifted Bayern Munich an early 2-0 lead on Wednesday night.

"I think for them to be 3-1 up is not good enough from us," said the midfielder. "We made some mistakes that cost us a lot. We started the game well and the first time they got around the box they scored. After we conceded a sloppy goal at a corner again. Once it is 2-0 to a big team like this, it is a difficult game to play.

"We kept trying, kept believing and we got in the game through Lukas [Podolski's] goal and we kept trying to get another. We took some risks and paid for it on the break."