Arsenal boss Wenger: Mertesacker better than he looks!
Wenger said: "Maybe he is less elegant and the visual impression is less pleasing but he is efficient and intelligent.
"He combines well with both Vermaelen and Laurent Koscielny. They are good partnerships. He is a bit better at positional play.
"I have three good centre-backs. I can't be wrong when I make a decision because all three deserve to play."