That's what you do all the hard work for, to play in situations that put your body through gruelling times. If you're not up to it, pull out.

That's when you've got to grit your teeth and hang in there and try and find a way to win when you're not playing your best tennis - that's what I can be proud of

Even when I was No. 1 in the world, I was taking it one match at a time. I never was a player to look too far ahead, the way draws can pan out.

When I go out to play, I still believe I'm as good as anyone out there. I don't have to prove anyone wrong. I know what I've done and how well I can play.

I'm fortunate: I can play as long as I want to play. There's no coach or trainer who is going to say to me that I'm dropped or sacked, it's time to move on. I can play as long as I want to play.

Matches are won and lost so many times in the locker room.

When I was a kid in Adelaide, I dreamed of becoming No. 1 in the world, winning a grand slam and the Davis Cup for Australia.

I was lucky enough to win the Davis Cup in my first year in 1999. I won my first slam at the U.S. Open in 2001 and became world No. 1 later that year. By the age of 20, I'd done it all.

I'm not a guy who needs to read motivation books.

Everyone has to call 'time' at some stage.

I'm one injury away from hanging up the racket at any time.

A student never forgets an encouraging private word, when it is given with sincere respect and admiration.

I can type faster than I can point. And my mother told me that pointing is impolite.

If players are performing for you, their age shouldn't really matter, especially because the older players can bring their experience to the table.

I've never enjoyed myself. I'm incapable of enjoying myself. There's just some people who don't enjoy themselves very much.

When once I got to America I fell in love with hippie culture, and I've always wanted to live in the country and grow organic vegetables.

It ["The Ancient Mariner"] is marvellous in its mastery over that delightfully fortuitous inconsequence that is the adamantine logic of dreamland.

When a ball goes into a net it only means something because we decided it means something. When somebody punches somebody in the face it always means something.

I must be very clear in one thing... Being a pageant girl is not who I am or what defines me.

Pete Townshend used to crash chords and let the guitar feed back. He's overrated.

How I regret now that my perpetual emotional dependence on the man I love has killed all my other talents - my energy too: and I had such a lot of that once.