Arsenal manager Arsene Wenger has said that his side were "not decisive enough" in their 3-1 defeat to Manchester United on Saturday.
The Gunners were 2-0 down inside the opening 15 minutes after strikes from Antonio Valencia and Jesse Lingard, but Alexandre Lacazette pulled one back for the hosts.
Lingard stroked home from Paul Pogba's pass to make it 3-1, and Wenger has admitted that Arsenal had enough chances to get back into the game.
"I think we didn't start well at all at the back and we are guilty of that," the Frenchman told BBC Sport. "Despite being 2-0 down we should have come back - we had enough chances. We produced excellent quality, but were not decisive enough.
"Psychologically it was a big blow to go 2-0 down so early on - especially at home. We were too on the edge mentally maybe - you cannot be in a game like that.
"It was a mystery yes [to not score more], but David de Gea was man of the match by a clear mile."
De Gea made 14 saves in the match to stop Arsenal from scoring, including a spectacular double stop to deny both Lacazette and Alexis Sanchez.
