Walcott made his comeback as a substitute in last night's victory over Standard Liege.
He said: “I feel great. I have been training well, the fitness coaches and all the staff have been looking after me very well.
“I would love to play up front, it was my position. I played up front at Southampton but it has been quite a while. I will play anywhere for this team.
“The knee feels fine. I have spoken to a couple of the players who have had similar problems — Cesc Fabregas and Tomas Rosicky — and they said I would feel it for the first initial weeks but I haven't felt the problem.”