"We weakened a bit physically in the second half but overall it was a very important test for us today," said Wenger. "We expected a difficult game.
"We were not disappointed - a game with a lot of pace, where both teams went for it in different styles.
"It was a good test mentally as well, because we went 1-0 down with their first shot on goal. We came back and won this game. You could say that we had a good performance today overall."
Arsenal are now fifth in the league table with 12 points from seven matches.