Manchester United boss Sir Alex Ferguson won't make any predictions over his own future.

Ferguson is acutely aware that, at 71, nothing can be taken for granted.

"This question (how long will you go on?) comes up more and more because I get older. It is a fact of life. I can't avoid that," said Ferguson.

"It will definitely be me (who decides). The issue is how I feel in myself.

"As you get older, you are not guaranteed your health, no-one is when they get into their 70s.

"I just touch wood that my health remains for a long time yet.

"At the moment, it remains hunky dory. You never know. We are all vulnerable to age. That is the question. How will I be in a year, two years, three, whatever."