You've got to take the initiative and play your game. In a decisive set, confidence is the difference.

I still have this image: I can't be controversial, I can't say things.

Ninety percent of my game is mental. It's my concentration that has gotten me this far. I won't even call a friend on the day of a match. I'm scared of disrupting my concentration. I don't allow any competition with tennis.

My first U.S. Open I think was just very special for me because that was sort of the beginning of what was a 'Cinderella' story for me.

If you're a champion, you have to have it in your heart.

I've had a lot of fear in my life, from fear of flying to fear of making a speech in front of a lot of people.

In tennis, at the end of the day you're a winner or a loser. You know exactly where you stand... I don't need that anymore. I don't need my happiness, my well-being, to be based on winning and losing.