Once you start believing in yourself, anything is possible.

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.

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.

Concentration is born on the practice court... you must mentally treat your practice sessions as matches, concentrating on every ball you hit.

The goal for the Laureus Sport For Good Foundation is to give kids an opportunity to be involved in sports and hopefully learn some lessons along the way. We want to put them in a safe environment, help them if they need it and maybe they will get a scholarship to a school because of the skills that they learn. Sport is just a starting point.

Changes made to please others are unrealistic, but more important, they're unfair to you.