Mathieu Flamini admits Arsenal weren't firing on all cylinders during Sunday's 0-0 draw at Wigan Athletic.
"The pitch was horrible but what can you say? It was the same for both teams. Of course we like to play and we had to play more long balls so it was more difficult for us.
"But you cannot moan. You just have to score goals and we didn't so now we have to work harder in training and be ready for Middlesbrough [on Saturday].
"It's always difficult especially after big games like Milan, you need to be 200 per cent concentrated. But we had five days to recover.
"We missed a little bit in the final part. But it's like that sometimes. We have the quality and we are strong so we just have to keep going."