David De Gea is world's best goalkeeper after efforts against Arsenal, claims Roy Keane

MANCHESTER UNITED'S David De Gea is the world's best goalkeeper, according to club legend Roy Keane.

United exited the FA Cup tonight in the quarter-finals after falling to a 2-1 defeat to old rivals Arsenal.

De Gea failed to keep out strikes from Nacho Monreal and Danny Welbeck, but kept his side in the game with a number of world-class saves.

Gunners pair Alexis Sanchez and Santi Cazorla both had chances to put the game beyond any doubt late on at Old Trafford, but the Red Devils stopper was at hand to keep them out.

David De Gea denied Alexis Sanchez late on

And former United captain Keane was full of praise for the 24-year-old stopper.

"I think David De Gea's the best goalkeeper in the world at the moment," Keane said after the defeat.

"But for United, it's not a good sign at the moment when he's getting man of the match most weeks."