Arsenal boss Arsene Wenger is unimpressed seeing Mario Balotelli escape punishment for his X-rated challenge on Sunday.

Wenger admitted he is puzzled at Manchester City striker Balotelli escaping action after his challenge on Alex Song in the weekend clash, compared to QPR skipper Shaun Derry being sent off after making contact with Manchester United's Ashley Young.

He said: "I don't still understand well. If you look at, for example, the case of Balotelli, okay you get an explanation and okay you have to accept it.

"If you look at the case of Derry and think okay you can accept it.

"But if you put the two together it looks absolutely unbelievable that one is suspended and the other isn't.

"But when the ref has seen something, no-one can get over the rule. I think we should have an exceptional committee of ethics to get over that.

"The global situation does not make sense. For people who love football, it is difficult to understand why one is not punished at all and the other one is punished.

"I'm not keen to get Balotelli suspended but for football fans it is difficult to understand."