I've been motivated by overcoming challenge and overcoming the hurdles and obstacles that face me. There still is plenty out there to get motivated by.

If you're ranked number one in the world it's because you've earned it, and I think the only way to really get there is to have that ability and to have it nurtured in a very competitive environment at an early age.

How lovely it is to dream while you are awake.

Tennis was always sort of a - a learning. It was a vehicle for me to discover a lot about myself. And the things that I sort of discovered at times I not only didn't want to see it for myself but I certainly didn't want millions of people to see it.

The great part about tennis is you can't run out the clock.... As long as we were still playing, I had a chance.

I feel old when I see mousse in my opponent's hair.

The best predictor of future events is probably past events.