The 66-year-old is not willing to remain at Old Trafford beyond 70 as he wants to dedicate more time to his personal life.

"I won't be managing here when I'm 70. No, never. I can assure you of that," he said.

"I won't be managing here any more than three years at the very, very, very most - no question.

"There is a time when you have to think about time for yourself. You know, my wife is getting older and I have to think about that.

"I think she deserves a bit of my time. The older you get, the more guilty you feel about it. What I would like to do in life is travel to places I have never been to.

"I would love to go to the States and spend about three or four months there. I will still be involved with United in some shape or form. I hope so because I have a good relationship.

The Scotsman has been at the helm at United since 1986, amassing a remarkable number of trophies with the English titans.

Relying on his supreme record with the Red Devils, Ferguson is confident that he will never get sacked by United and that the exit decision belongs to him.

"There is no chance of me ever being sacked. I think it will be my decision and [chief executive] David Gill is happy with that," he added.