Once you start believing in yourself, anything is possible.

The mark of great sportsmen is not how good they are at their best, but how good they are their worst.

Some players when they become No. 1 they put too much pressure on themselves.

The mentality, that's something you should be able to control. Whether you are healthy or not, how fast you can run - they aren't things you can work on, but the mentality should be.

The tennis ball doesn't know how old I am. The ball doesn't know if I'm a man or a woman or if I come from a communist country or not. Sport has always broken down these barriers.

There is no cheap way to achieve the ability to turn pro in tennis; it unfortunately is more expensive than team sports.

Keeping a journal of what's going on in your life is a good way to help you distill what's important and what's not.