Policy is the way you can change the world.

Defense is about will and effort and a certain toughness you have to have.

I think it's the way I'm wired, the way I'm built. I want to improve. If you're not improving, someone's passing.

It's easy for especially NBA players to get caught up in the stress of the job, to get caught up in negativity and in what other people think, and it's hard, but the best way to live is to keep things simple and enjoy every day.

It's amazing how sports is a way to control the masses. But it also unites people.

A lot of times,, you are not going to fit in; a lot of times you are going to have to skip those parties to get to where you want to be.

Momentum is everything in this league.

My best asset to my game is my IQ. I play the game thinking the game first.

You always have to think in the back of your mind that someone's working harder than you, someone's getting better than you. That's what drives me every day. I always think there's someone out there working harder.

I want people to have clean water. People in this country take it for granted, the ability to drink clean water whenever they want. There are millions of people far less fortunate in this world, and it's my duty to do as much as I can to change that. I don't see that as insurmountable at all.

When people say that American tennis is dead and things like that, you kind of take it a little personal.

I'm really lucky to have Lindsay Davenport as my coach. She was number one in the world, and she's won Grand Slams, so if there's any person who can help me get through, it's her. Getting her advice is very special for me.

I have one of those bodies that is just a little more injury-prone.

You can get eight thousand great, amazing messages, and someone will send you one thing that you're maybe self-conscious about, and that's the only thing in your head for the rest of the day.

People always look shocked when I tell them the Cincinnati Open is one of my favorite tournaments.

I've always loved Charleston. It's always been one of my favorite tournaments.

I enjoy lifting weights more than I enjoy getting on the treadmill to run.

On those days when you don't want to get up, I think, I'm going to get through my entire practice without saying how tired I am or I try not to complain just because I was in a bad mood when I woke up. Even if it's not perfect and I slip up, I can catch myself and make myself of aware of where my mental space is at and move on.

I make a little goal every day and work toward achieving it - even if it's the smallest little thing.

A lot of people just assume men's tennis is better.

I try to live in the moment and not overthink things because then you start putting yourself in situations that you don't want to be in pressure-wise.

I loved dance, but tennis felt more natural to me. Dance did help with my rhythm and balance.

People aren't winning Slams at 21 anymore. It's later.

Sometimes you have to give yourself a break.