The midfielder has been linked with a move to England, but Perez says he shouldn't shoot too high, comparing him with Riyad Mahrez.
"Mahrez was unbelievable at Leicester City," Perez told FOX Sports.
"Then he went to Manchester City and became one of the players. That would be Ziyech. I think he's at his absolute best now. He will not get the role he has at Ajax at Manchester City. Kevin de Bruyne and that kind of player are playing there."