I think I will always stay involved in tennis and would like to give back by helping out young players. I have done a little commentary and may one day enjoy doing that again.

Daniel, my big brother, is eight years older. I'm lucky he didn't mind hanging out with his little sister and my younger brother.

Control the things you can control .

I started mountain-bike riding two years ago, which is much better than riding a stationary bike in the gym. Mountain biking is a total body workout.

You're the best in the world, so you deserve those little perks along the way if you can get them.

I think Serena Williams is the best tennis player of this generation, if not the best ever. It is amazing for her to be playing as well as she is at the age of 31.

I love to get home and hang out with my family. My brothers and I love spending time at the beach. I enjoy doing all kinds of surf sports and keeping healthy.

In tennis it's easy to get greedy - and one Grand Slam doesn't feel enough any more.

There is a master way with words which is not learned but is instead developed: a deaf man develops exceptional vision, a blind man exceptional hearing, a silent man, when given a piece of paper...

Just by doing what rich do... can make you also rich... Rich drink coca-cola so you can too!

I never listen to the radio unless I rent a car.

Of course, you have to have a good reputation, especially as an artist, as a musician, so that other musicians would like to play with you.

In the human heart one generation of passions follows another; from the ashes of one springs the spark of the next.

When today’s race is over, it's over. The only race that matters is the one coming up.

I know there's a lot of guys who would love to see me fail. Well, good. Let 'em. I'm glad.

There will be many times when we won't look good-to ourselves or anyone else. We need to stop demanding that we do. It is impossible to get better and look good at the same time.

You can gauge a country's wealth, its real wealth, by its tree cover.

Be yourself. That's it. I got about 45 [billionaires] . They are all different, all unique, and they are all self-made.