"He is up for the challenge because he is 200% professional."
Lehmann turned 38 on Saturday but Wenger said: "Jens doesn't want any presents. Jens wants to play because he thinks he is the best keeper.
"It makes it worse to put him in and out again. He has done nothing wrong. Almunia has been in the team and the team is doing well. It is as simple as that."