Arsenal captain Martin Odegaard admits Manchester City deserved their 3-1 win on Wednesday night.
The result sees City move ahead of Arsenal as Premier League leaders on goal difference, though having played one game more.
Odegaard said afterwards: "The game is decided in the boxes and we were not sharp enough, in front of the goal and in our own as well. They were better. Apart from that, we played a good game, did many good things and had many good periods, but we have to be better in the boxes.
"It is football. Sometimes chances go in, sometimes not. But that is where we need to improve and be more clinical and defend our box. That is not just about one player, but the whole team.
"As we have said all season, work hard and take it game by game. It is the same now. It is one game we have lost here today and now we look to the next one. A new game on Saturday and we must come back and win.
"It was an unbelievable atmosphere and we are so grateful to everyone who came here today and made the game special. We will work hard to give them something to make them happy about."