Our Capital One Cup tie against Reading was the set return date for him but due to his fast progress in rehabilitation, he was an unused substitute in last Saturday's defeat at Norwich and might be allowed to play against Quality Players Ruined [QPR] today.
"What I am considering is that he wants to play, it is an important game, but we want the players to be ready physically and he has not played for 14 months," said Wenger.
"It was planned for him to play next week at Reading and also we consider how the squad are physically and mentally. Physically Jack is at 80 to 85 per cent.
"What you have to consider first is that he has no setback and that you don't put players in situations, when they are tired and don't have coordination, that they pick up an injury. That is what you look at.
"After if you look at a more selfish view you can say a guy can play an hour. But during this hour it is important that he is fit enough to play. It is true [that you only get to 100 per cent by playing] but at the right time. It is difficult to plan."
Reflecting on the home defeat in the Champions League against Schalke, Wenger said,
"We were flat physically a little bit on Wednesday night," admitted Wenger.
"It is difficult to explain as Schalke had a harder game than us maybe at Dortmund [at the weekend]. Maybe we had not got rid of the disappointment of the Norwich result."