Don't worry about what people say.

Martina and I went through a very bad five years. Everything's very good between us now, but it was a long haul.

I love to promote our sport. I love grass-roots tennis. I love coaching. I love all parts of the sport. I love the business side.

I always listen, I ask children, I even ask adults in tennis, "What are your children playing?" And most of the time it's not tennis. It's pathetic.

Champions take responsibility.

Being Number One isn't everything to me, but for those few hours on the court it's way ahead of whatever's in second place.

It's very important to take tennis to the people. For young people, they get to see the best in the world.