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.

Often in football a game is really balanced and one small detail will make the difference between winning and losing. We try to find the detail that makes the difference for us.

Sportswear and activewear have been evolving over the years, and what makes it interesting is how you reflect the culture in which we're living in - whether it's creating clothing for a certain sport or creating new materials that we think athletes or people who are physical want to wear.

The way skateboarding contests were in the past was like going to a basketball game and being told at the end of the game what the score was and who won. Think about how unengaging that would be if you didn't know who was ahead or if it was a close game.

I am passionate about football. My support for Celtic FC has got me through some hard times in my life. I still play regularly, too.