"We can definitely put another good performance in and get to Wembley."
Keane will, of course, miss out on witnessing Sir Alex's emotional farewell to Old Trafford on Sunday due to his engagement at Vicarage Road but he is keeping a close eye on his Under-21 pals and was at the recent 1-1 draw with Liverpool.
"I'll hopefully come back on Monday for the trophy parade," he explained. "I've got to get back for that!
"I was also back at Old Trafford for the Liverpool match. I always watch them on MUTV as well as I'm interested in how they're playing. They are doing very well defensively and I hope they can keep it going and win the league again."