"Don't forget that the other three all won European Player of the Year which was unique coming from one club," said Ferguson in the News of the World.
"If these lads ever did achieve that level, it would be fantastic for us as a football club to have them, but I think that is years ahead.
"With players of their ability nothing is impossible. I wouldn't want to put that accolade or pressure on them until a few years when they've achieved more.
"But they do have similar aspects to their game. They are courageous, they enjoy playing, they can beat men. They are exciting players, they are young enough.
"They produce moments in a game that can change everything that is happening on the pitch. They can turn a match with their individual skills.
"Each of them has these things in his locker. You hope one of them will produce the things that will win games for you."