Are you guys ready for the Williams sisters? We'll see you on Sunday.

Are you ready for the Williams sisters? ... We'll see you on Sunday. There's going to be a lot of hard hitting and a lot of hard serving. We'll both have some tricks up our sleeves.

I always like to win. But I'm the big sister. I want to make sure she has everything, even if I don't have anything. It's hard. I love her too much. That's what counts.

When you're a big sister, it's a great job. I don't know how little sisters feel about their job, but when you're a big sister, you're supposed to take care of everything. And you feel good about it. I do.

For the younger sisters, we always look up to the older sisters because they're always ahead of us and they always win.

Tennis is mostly mental. Of course, you must have a lot of physical skill, but you can't play tennis well and not be a good thinker. You win or lose the match before you even go out there.