A great tennis career is something that a 15-year-old normally doesn't have. I hope my example helps other teens believe they can accomplish things they never thought possible.

I definitely feel Russian inside, even when I'm in America I feel Russian.

If I can create something that allows a woman to feel better - that is the true reward.

I don't have to follow any special diet or count calories. I try to eat healthily and before a match I load up on pasta and salads. But I pretty much do what I want.

I have had lots of luck in my career but there has also been a lot of hard work.

If I'm nervous, it means I had to work hard to get there, whether it's playing in a tournament or speaking at an event. So I try to stop and be proud of getting to live in that moment.

Without my dad, I wouldn't be here.