If I have a reason to do something, and I have enough passion, I generally succeed.
Sometimes I can wake up and I can beat anyone.
To cry on court during a Wimbledon final, you must feel so lonely.
I still speak Czech with my parents because I was born there.
Right now I like baseball, hockey and tennis players. And horseback riders.
If you don't lose, you cannot enjoy the victories. So I have to accept both things.
If the plane moves, some turbulence, I am nervous flyer.
I am not the most courageous guy in the world outside of the court.
I used to pretend that I was Tom attacking Jerry, who was drawn on the ball.
I always tried to win. I was as competitive as I am today.
I am fast and very powerful on the court, so this is what matters.
I never give up. Doesn't matter what the score is.
My fitness trainer's English, my physio's English, some of my friends are English. I don't have a problem with English people at all.
I train Monday through Saturday. I usually have fitness training for 90 minutes, then I'm on the tennis court for 3 to 4 hours.
Every time I am off the tennis tour, I go back home.
We have a harder way to succeed in life as Serbs because of the past that we had and because of the history we had.
Martina and I went through a very bad five years. Everything's very good between us now, but it was a long haul.
Sport's always a good thing - it's healthy, and it takes your mind off other things.
Obviously you try to keep as much of your private life as private as you can.
I think most players would love, at one stage in their career, to say, 'I've been No. 1 in the world.'
I'm not an overly ambitious person; I don't feel like I have to excel.
