The Gunners went into Saturday’s showdown with the leaders at the Emirates Stadium unbeaten, and holding some genuine hope of making a real impact again at the business end of the table.
Goals from Fernando Torres and Juan Mata’s free-kick secured a 2-1 victory for the visitors, while Gervinho was on target for the Gunners.
Wenger said: “We can be much better. Technically we were average, and also so was our authority at the back. I think there is some psychological damage because we lost the game.”