I never close my mind to anything and eventually want to branch out. But for now, tennis is still number one for me.

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.

I've been involved with Berlei for almost my whole career. I actually discovered them well over 10 years ago, probably 2002 at least. My mom introduced me. She said, "Listen, you should try these bras." And I was like, "Really?" So I tried it and since then I've never worn another bra.

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.

I think I actually made a very kind gesture out of nowhere; I decided in the middle of that match that for every ace I hit I want to donate money. I just think people should honestly look at themselves before they judge another person. I've never been spoiled. I want a Range Rover very bad, but I refuse to spend the money to buy a Range...The diamonds are borrowed. I won't buy them because I'm too cheap.

I just never give up. I fight to the end. You can't go out and say, 'I want a bag of never-say-die spirit.' It's not for sale. It has to be innate.

You can't underestimate anyone.