Unfortunately the world is what it is now. People don't get along for whatever reason. As professional athletes, in a way we're almost ambassadors for peace, because sports brings everyone together.

There were a lot of people shouting out. I know it's not proper tennis etiquette, but this is the first time I've ever played here that the crowd has been behind me like that. Today I felt American, you know, for the first time at the U.S. Open. So I've waited my whole career to have this moment and here it is. ... It was great. It was awesome. It was like winning gold.

There is nothing like playing at Wimbledon; you can feel the footprints of the legends of the game-men and women-that have graced those courts.

A win's a win, unless it is not a win, and then it's not a win.

Everyone makes their own comments. That's how rumors get started.

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.

A lot of people say, "Oh, I get this high from working out." I've never felt that, maybe because I've worked out for so long it's just a norm for me to push super, super hard. I don't feel the euphoria. But at the end, when it's all done, I feel euphoric. I'm like, "Yes, the work is done." You just feel like a glowing feeling inside.