Rivalries don't necessarily mean races being close at major championships. I had a rivalry with Butch Reynolds for many years. I won all the races, but Butch was the world record holder before I came into the sport, he was extremely talented and he was the only other man running 43 seconds.

All my life I believed I became an athlete through my own determination, but it's impossible to think that being descended from slaves hasn't left an imprint through the generations.

On the £20,000 Mercedes prizes for each winner at the World Athletics Championships in Stuttgart- Anyone good enough to win already has one.

I've had to learn that not everybody does things my way. But I do expect the absolute best of everyone around me, and I'm disappointed when people don't expect that of themselves.

The basis of self-discipline: Don't allow the edges to blur.

They think because I'm small, they can do what they want to do to me. But I'm not weak. If I lower my shoulder and they lower they're shoulder, they're going to go down.

I always wanted to be a sprinter.