Ramsey won't turn 21 until Boxing Day but he is already establishing himself as one of the Premier League's most influential midfielders. Wenger expects him to get better and better.
"He is on the way up," the manager told arsenal.com.
"We speak about Robin van Persie but Aaron was out for one year when he was just getting into the team. That is tremendous. It is completely normal that he improves now because he is young. And there is still a lot of improvement for him.
"Secondly he is back to his full physical potential which is huge. We see that when we analyse the games. The worry we had is that he might be touched by being out for such a long time when it comes to the challenges. I have been impressed by the way he dealt with the whole situation."