Ali's belief in himself was something I picked up on, and it's become my own philosophy.

You get these moments in the ring that live forever. That's what Muhammad Ali accomplished, and I hope that I have, too.

Boxing is the ultimate challenge. There's nothing that can compare to testing yourself the way you do every time you step in the ring. On the downside, you meet a lot of really bad people in boxing, at all stages of your career.

Boxing was the only career where I wouldn't have to start out at the bottom. I had a good resume.

I played football ever since I was a little boy. Coming from a family of six boys, I guess we learned the game of football from a very young age.

I am as hungry now as I was when I began in the sport. If anything, I am probably a bit hungrier. It is because I know there are fewer tomorrows than yesterdays.

I'd been at Chelsea for a while and progressed quite quickly until I got to the first team, and then it was different. I was used to playing every minute of every game, but when you get to that level, the step up is massive. There are world-class players in front of you, and no matter how talented you are, breaking in is difficult.

United is no longer just a football club; it is an institution. I feel the demands are beyond one human being.