Just go out there and do what you've got to do.

You can't live in the past, there's nothing you can do about it.

The only people that really have a chance against Serena [Williams] are people that are strong, that can handle her power that move well, and that's a difficult combination.

Sport doesn't know barriers, really. You are judged on your performance... how far you can jump, how fast you can run, how well you can hit a tennis ball.

The moment of victory is much too short to live for that and nothing else.

Variety is what I would recommend: As variety is the spice of life in food, so it is in exercise. Change it up. But most of all, don't overdo it.

I've been in the twilight of my career longer than most people have had their career.