You can be careful as far as you can, but you never know when you're going to fall over and break your ankle. It's like when you drive a car, you don't think about crashing, do you?

When I started to do quite well on the tour I thought I'd treat myself to a bright red Ferrari. I had always had a soft spot for them as a car brand and, when I was in the position to afford one, I decided to go for it.

I am still been pumped to train and get myself ready for the biggest events.

I'd like to say that I am romantic person, but I don't think I am. When I won my first tournament I went into the crowd and kissed my girlfriend. I was 18 and didn't have my coach with me, I was there on my own, and I just needed to celebrate with someone I knew. I always start out with good intentions. I'll say something nice, then I'll just put my foot in it and ruin the moment.

You have to go into each match believing you can beat all of the players.

I used to think that losing made you more hungry and determined but after my success at the Olympics and the U.S. Open I realise that winning is the biggest motivation.

I listen to my iPod as I walk on. If I'm winning I'll listen to the same song, that's like a good luck thing - usually The Black Eyed Peas' Let's Get It Started.