Arsenal boss Arsene Wenger admits they're missing injured defender Laurent Koscielny.
Wenger conceded his defence would have been stronger had he been able to keep building on the promising partnership Koscielny was beginning to enjoy with Per Mertesacker.
"You miss him every time you concede a stupid goal," Wenger said.
"You think, 'Oh, if he was there', but we have conceded some with him as well. Look, ideally we want him here. Could we have stopped the goals without Koscielny? I say yes.
"So I think it would be a little bit escaping the real responsibility. When you are a defender and you make a mistake you have to stand up for it. Everyone makes them."
