Quote:
"For winning the group, you can say that's nearly impossible now," conceded the Frenchman, who was highly critical of his team's defending.
"The first Anderlecht goal was offside but defensively our performance was not good enough to do it.
"At 3-0 we thought the job was done and it was a combination of switching off and fatigue as well.
"In the Champions League you need to be at the mental level or you get punished and certainly we were not."
Asked whether he planned to strengthen his defence in the January transfer window, Wenger said: "Honestly it's not the worry tonight.
"We just came out of two clean sheets and maybe thought we had got the job done at 3-0."
Fatigue? Really?