Will I have to explain to my daughter that her brother is gonna make more money doing the exact same job because he's a man? If they both played sports since they were three years old, they both worked just as hard, but because he's a boy, they're gonna give him more money? Like, how am I gonna explain that to her? In tennis we've had great pioneers that paved the way - including Venus [Williams], who fought so hard for Wimbledon to pay women the same prize money they pay men, and Billie Jean King, who is one of the main reasons Title IX exists.

Luck has nothing to do with it, because I have spent many, many hours, countless hours, on the court working for my one moment in time, not knowing when it would come.

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.

I don't have anything to prove ever, ever in my life. If I have something to prove, what does that mean for everyone else? And I think everyone should have that attitude. You just have to prove to yourself that you can go out there and be the best that you can be and not prove anything to anyone.

With a defeat, when you lose, you get up, you make it better, you try again. That's what I do in life, when I get down, when I get sick, I don't want to just stop. I keep going and I try to do more. Everyone always says never give up but you really have to take that to heart and really do never definitely give up. Keep trying.

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

I never left my roots. You can identify me as someone that didn't become high and mighty. Humility is a defining [trait] all of us can forever learn, and I try to be as humble as anyone can be.