Tennis is one of the only sports in America where the sport doesn't grow with the size of the person - it just forces you to swallow the whole pill.

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.

I don't always choose to stay fit by playing tennis, because that comes with its own wear-and-tear.

Success doesn't always come in the form of a trophy. Keep striving for success.

No athletes talk to themselves like tennis players. Pitchers, golfers, goalkeepers, they mutter to themselves, but tennis players talk to themselves-and answer. Tennis players look like lunatics in a public square.

This sport has given me so much that my hope would be to give back as much as I can for as long as I can.

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.