Arsenal boss Arsene Wenger knows Frank Lampard will lift Chelsea for their big derby clash.
Lampard is set to return on Monday and Wenger knows exactly how dangerous the England star can be.
"He is a player I like and rate highly," said the manager.
"You are not especially pleased he is back against you, but on the other hand we play Chelsea with their real strengths and if we beat them, it will have even more value."