Manager Arsène Wenger has admitted that he got his tactics wrong against Manchester United by playing Emmanuel Adebayor as a lone striker in a 4-5-1 system.
However, the Frenchman also said that his tactics were forced on him by the absence of Robin van Persie.
Wenger said: "Sometimes Adebayor was a bit too isolated up there.
"Maybe I could have played Theo Walcott up front, or Eduardo or Niklas Bendnter. But I went for a different approach.
"Without Robin van Persie the balance in the final third was not completely right.
"That's my fault. I'd look at that again.
"In the final third, we dropped a little bit too much off and that took something out of our game.
"The game didn't reach the level in terms of technique that I'd expected it to reach, but it was still an interesting game with contrasting styles."
