I've been active in animal rights and all kinds of environmental stuff and children's charities over the years.

I'm an American. You can't go on where you were born. If you do then John McEnroe would be a German.

If it feels right in your gut, this is who you are, this is what you do, this is what you feel, then don't hide that. You just stick to it and the world will catch up.

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.

Tennis has given me soul.

Just put one foot in front of the other and don't worry about the length of the path. Once you get on that path, and the longer you stay on it, there eventually will come a time when you will not turn back.

Life is about challenges and how we face up to them and the attitude we take into every day life so hopefully we'll be able to motivate people to do more with their life.