Wilshere was impressive in victory over Tottenham.
"He will get better and better,'' said the Arsenal manager. "That is why I take him off, to rebuild him slowly. He is 20. Cazorla is 27. When we played Villarreal in 2006 Cazorla was on the bench. He didn't play, and he was one year older than Wilshere. The experience he gains at the moment and the talent he has means he will grow."