Tottenham Hotspur boss, Ange Postecoglou, has blamed his players for not taking their chances as they lost 1-0 to Arsenal on Sunday.
The first North London Derby of this season was decided by a second-half header from Gabriel Magalhaes.
Spurs dominated most of the game, but failed to trouble the Gunners backline.
Postecolgou, speaking to BBC Match of the Day after the game, said: I thought it was a tight game all the way along. we controlled it for the most part and got off to a good start. We didnt capitalise on the opportunities and we were unable to get on top of them.
We lost concentration [for the goal]. Weve got some big guys in there who really attack the ball and we just switched off for a second.
