You know, a lot of things changed. What never changed is the illusion to keep playing tennis, the illusion to keep doing well the things, and the illusion to be in a good position of the ranking and play these kind of matches.

I am a guy who likes to do what I am doing with passion, whether it's a soccer match with friends or golf.

I always work with a goal - and the goal is to improve as a player and a person. That, finally, is the most important thing of all.

Don't think about being the number one in the world, try instead to get through today's program as well as you can. Then we will see whether one day you'll end up as number one or number 100.

There are many moments during a match when you are tense, wrestling with yourself. Tennis is a lesson in self-control.

Hard courts are very negative for the body. I know the sport is a business and creating these courts is easier than clay or grass, but I am 100 per cent sure it is wrong.

It's hard to say, 'I don't believe in God.' I would love to know if God exists. But it's a very difficult thing for me to believe.