Relationships are give-and-take, and when you're a tennis player, you're certainly not giving. You have to be self-absorbed. It has to be about you.

To be a tennis champion, you have to be inflexible. You have to be stubborn. You have to be arrogant. You have to be selfish and self-absorbed. Kind of tunnel vision almost.

My favorite tennis player, who I'm amazed by, is Roger Federer.

Nick Kyrgios, if you don't want to be a professional tennis player, do something else.

Because I was a tennis player, Billie Jean King was a hero of mine.

I'm actually a pretty good tennis player!