Rio would be my last Olympics.

At the end of the season, I normally get some time off training and can go on vacation and enjoy myself.

My coach told me if I broke the national record for the 200, I could run a 100.

People always say I'm a legend, but I'm not. Not until I've defended my Olympic titles. That's when I've decided I'll be a legend.

Cristiano is better than Messi, without a doubt. He's more of an all-round player

I love competing. I am so competitive. I definitely need to win because I hate losing. I am the type who if I know I will lose I won't compete.

You can't really give away anything in your book ... should be exciting, it's my life, and I'm a cool and exciting guy.