I have no sense of humor about losing

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 like a lot of sports. Especially football - it's my favourite sport. My uncle played football in Barcelona for nine years and played for Spain in three World Cups.

What distinguishes tennis is respect for one's opponent, one's conduct on the court.

I've stayed calm when I'm winning and I've stayed calm when I've lost. Tennis is a sport where we have a lot of tournaments every week, so you can't celebrate a lot when you have big victories, and you cannot get too down when you're losing, as in a few days you'll be in the next tournament and you'll have to be ready with that.

For me, that's the most important thing, feel myself happy when I am playing. If I am healthy and I feel myself competitive, I am happy. Then is obvious I would like to win. But I know if I am in finals of important events, the normal thing is I finally win titles.

Some people may learn something from the way I play tennis. But there are also players who are better than me in certain techniques.