However, Wenger has said that the problem should not keep him out of Saturday's Premier League game at the Emirates Stadium.
The Frenchman told Arsenal's official website: "He is alright. He came back with a knock on the knee, but it was just a kick.
"We will have a test on Friday to see if he is fit enough for Saturday or not. When you have not played, there is always a little doubt, but not a major one."
Arsenal currently sit top of the Premier League table.