Wenger believes that his side showed character to perform in the early stages following last weekend's disappointing performance at Old Trafford.
He told Sky Sports News: "It was a close game with both sides playing very well.
"Overall I feel after the stick we got from Saturday's game it was important to show a great response and that is exactly what we did.
"We played against a good team and it we were a bit unfortunate to concede before half time. We had a chance with Walcott at the end but overall I feel 2-2 is fair."
Arsenal stay in second in Group B but are now just a point ahead of Olympiakos in third place following their win against Montpellier.