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.

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

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.

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.

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

A guy who is equipped mentally and educationally doesn't need a confidence check. He is positioned and prepared to GO. Are you?

Men and girls, men and girls: Artificial swine and pearls.

Ritual is a terribly important, binding cement in a society. If we abandon formality and rituals, we're actually weakening the relationships that exist between people that bind.

A day alone, only that would be death.

Enjoy the necessities of life but eschew the excesses.

My mother is my manager and so knows exactly what I do and so on.

He's worked his entire life and he's never lived a single moment, I mean not a moment, in the real world.

During the winter my attention was attracted to the changes in the stars and planets in the sky.

Of all the Gods, Love is the best friend of humankind, the helper and healer of all ills that stand in the way of human happiness.

I asked [my doctors] if I'd be able to play singles tennis and they said I could. That made me very happy since I haven't played in five years.