I wanted to use sports for social change.

My whole life has been about equal rights and opportunities. For me it really goes back to the health of mind, body and soul.

I got to see the best players in the world every year the week after the U.S. Nationals, which is now known as the US Open, in Los Angeles. That made a huge difference in my life.

The trouble with being number one in the world - in anything- is that it takes a certain mentality to attain that position, and that is something of a driving, perfectionist attitude, so that once you do achieve number one, you don't relax and enjoy it.

I always respect right off the bat because we are human, but then over time you learn who the person truly is, just like they learn about you. Hope it works out really well, and you hope that builds a stronger connection over time. You can't be friends with everybody.

You've got to win in sports - that's talent - but you've also got to learn how to remind everybody how you did win, and how often. That comes with experience.

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