Sunderland boss Martin O'Neill says Arsene Wenger must stay in charge of Arsenal.

O'Neill, whose side play Arsenal in the FA Cup fifth round on Saturday, reckons Wenger is the greatest boss in the club's history and that the Emirates faithful should keep faith with the Frenchman.

O'Neill said: "His influence on English football has been immense and if he left tomorrow morning he would be considered Arsenal's greatest-ever manager - and there have been some excellent ones.

"Much has been made of the fact they haven't won a trophy for however many years it is but during that time they have qualified for the Champions League each year.

"They have lost some influential players this season that would be hard to replace immediately.

"But that's not to say that they don't have quality players or are not capable of winning this cup."