Everton boss Roberto Martinez is stunned by the latest barrage of criticism for Arsenal rival Arsene Wenger.

Wenger has been hammered since Arsenal's Champions League defeat to AS Monaco.

"You see the reaction and you see what Arsene Wenger has done and it is just incredible," said Martinez. "The way that he has changed the way we prepare teams in this country is unbelievable.

"He will be one of those managers that you will not appreciate how much you miss him until he has gone. He has got incredible experience. I just don't understand that sort of debate."