I think a smile can make your whole body. Models, they look fabulous, but they don't smile, and they look so mad.

I'm a high-performance athlete: I'm running, I'm sprinting, I'm sliding, I'm doing pretty much everything and the last thing I want to worry about is my chest. I want to just worry about playing the sport at the highest level that I can.

For the younger sisters, we always look up to the older sisters because they're always ahead of us and they always win.

I've had to learn to fight all my life - got to learn to keep smiling. If you smile things will work out.

I'm proud to have opened [two] schools in Africa and one in Jamaica [through the Serena Williams Fund and its partners]. I was given a lot. I was given two parents. That's already starting above a lot of kids. And then I was given the opportunity to play tennis and parents who supported that. I feel I can give back.

If anything, we haven't changed much since we [with Venuse Williams] were kids. We really are the same people.

When you lose, you get up, you make it better, you TRY AGAIN.