"We put Bayern under pressure and were unlucky because it was a 100 per cent penalty at 1-0 in the first half against Walcott," Wenger said in his post-match press conference.
"In the second half, the referee killed the game. After that, it was very different, but the referee I think was very powerful for Bayern tonight.
"Lewandowski, it was not only not a penalty, he was offside and on top of that he gives us a red card. That killed us completely.
"Overall, I must say that Bayern are a good side but today they must also say thank you to the decisions of the referee in the second half.
"I am angry and frustrated and at the moment, because we are in a difficult period, even more so.
"It's absolutely unexplainable and scandalous what happened really - that the guy behind the line gives the penalty and on top of that the red card after he had given the yellow.
"We have to take it on the chin and I have to stand up. I will take a lot of criticism but it doesn't change my mind. In the game, you have to deal with these situations but it doesn't make them right.
"I felt that we played very well and the referee has let us down. It was more the decisions of the referee that killed the game.
"It's irresponsible from the referee. At the end of the day, that is the reason for tonight's result."
When asked what needed to change at Arsenal, he added: "What needs to change at this club? What do you mean by that? I think this club is in great shape.
"We are going through a very difficult situation so what needs to change is a result in the next game."
Zakładki