I was passionate about soccer. I still am. Odd, though - playing soccer always made me much more anxious than playing tennis. On soccer days, I'd be out of bed by 6 in the morning, all nervous. But I was always calm when it was time for a tennis match. I still don't know why.

I just try to win the match by fighting for every point, and running down every ball.

When one player is better than you, at this moment, the only thing you can do is work, try to find solutions and try to wait a little bit for your time. I'm going to wait and I'm going to try a sixth time. And if the sixth doesn't happen, a seventh. It's going to be like this. That's the spirit of sport.

I have always tried to avoid regrets. Could I have done differently some things in my career? Maybe.

I doubt about myself. I think doubts are good in life. The people who don't have doubts I think only two things-arrogance or not intelligence.

It's more a tennis problem than a mental problem. The transition is difficult. It depends how much time you have. Playing on grass can sometimes be a bit of a lottery.

There is some moments on the career of everyone that are important ones. Is obvious that first title on clay makes a big difference. After that, I was confident enough to keep going, winning in Barcelona, in Rome, then in Roland Garros.