Wenger said: "I believe that the really difficult period is the first six weeks. You are in a brace and you cannot move at all. You cannot practice.
"When they take the brace off you can have rehabilitation and be busy the whole day but the first six weeks are really difficult.
"That is a massive blow for Cesc because he is a competitor who wants to play every day. If you play six games in a week he will want to play six games."