Tennis is mostly mental. You win or lose the match before you even go out there.

We're all conditioned that we shouldn't like our brothers and sisters, that we should be angry and fight. But that's abnormal. A lot of people think that the way Serena and I are with one another is weird. It's not.

We don't talk about tennis. I figure she knows what she's doing. I mean, what am I going to tell her?

The naysayers, they don't mean a thing.

I know I'm good at tennis. Other than that, everything else is a wild card. I'm a wild card.

We've been training and playing full-time since we were 18 and 19. So after tennis, we'll be excited to see what it's like to have more free time.

Just always believe in yourself. "Champions adjust." It's a line I learned from Billie Jean King, and sometimes your dream adjusts. Be willing to adjust with it and see where your opportunities ... sometimes a door closes but a window opens, so just follow your dreams and continue. You never know where it's going to take you.