The former United defender, who led his side to a 2-1 victory in their semi-final, first leg at the Stadium Of Light, admits the cup run comes a distant second to Premier League points as they continue the battle to preserve their top-flight status.
Sunderland face Fulham and Southampton before the second leg and the Irishman has set his team-mates a target of climbing off the foot of the table prior to the Old Trafford showdown.
"We just put this game to the side now for a few weeks because believe me, it's far from over. We have got a huge game against Fulham now," he said.
"We know that if we create and play like we can do in those games we will be
creating chances and we will be hurting teams. If we keep that belief, that's when we will get the wins.
"We drew 0-0 at West Ham but should have won the game; at Villa we should have won the game, so you are thinking, 'Okay, if we are keeping the clean sheets, eventually the goals will have to come for us because we are getting ourselves into such good positions'.
"It's a team game and maybe for a certain amount of time, we are thinking too individually about helping the team, in a good way as in, 'I'll be the one to help out'. But it's got to be that collective if the team is going to be successful."