Wenger said: "We didn't take advantage of the chances we created because we were a bit nervous in the final third. We were a bit too forceful and they defended with a lot of experience.
"Adebayor's wasn't the only chance. We had plenty. Eboue also had good chances, but we were a bit nervous and when we had shots we didn't test the keeper enough. Most of our shots were straight in the middle of the goal because we wanted to hit it too hard.
"You could see last Saturday against Manchester United that our mind was already on this game.
"We just wanted to force the decision too much. We weren't relaxed enough in the final third when we had the chances."
Wenger added: "We can play at a high tempo for 90 minutes. They will have to come out."