Wenger was pleased with the response from the 5-1 trashing at Liverpool last weekend, if somewhat frustrated by the final result.
He said: "It was important not to lose, but it was also important to win.
"I felt we were nervous.
"Our team was highly focused not to concede, and that maybe restricted our game going forward a little bit because we were certainly hit by the five goals we conceded on Saturday, and you could feel that here."
Wenger said: "(It was) first (about) not losing tonight, then (we can) come back to our normal level offensively.
"We have come out two difficult games and are still in a strong position, that is the only positive."