It's thrilling and it's an honor to be part of something bigger than your own self.

Life is challenging but I'm always up for a challenge.

I knew my destiny was to be in the winner's circle. There were times along the way where I didn't make it there. But I felt my destiny was definitely to win big titles, win lots of titles.

I have been recently diagnosed with Sjogren's Syndrome, an autoimmune disease which is an ongoing medical condition that affects my energy level and causes fatigue and joint pain.

I guess some kids around me had to grow up quickly, had all those problems. But I wasn't one of those kids, or around those kids, not at all.

We're all conditioned that we shouldn't like our brothers and sisters, that we should be angry and fight. But that's abnormal. A lot of people think that the way Serena and I are with one another is weird. It's not.

Tennis is mostly mental. Of course, you must have a lot of physical skill, but you can't play tennis well and not be a good thinker. You win or lose the match before you even go out there.