My first job is big sister and I take that very seriously.

For years I felt that I didn't have enough stamina and then, four years ago, I felt like I was not getting enough air but I was diagnosed with exercise-induced asthma. The medicine for asthma never worked.

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

Id like to imagine that in order to beat me a person would have to play almost perfect tennis.

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.

Of course, I want to be number one. But being happy and healthy is the most important thing.

Grand Slam losses are hard. I treat myself after losses though, I usually go to McDonald's and I have a hamburger and you know, something. Because you know, you just need to be nice to yourself sometimes after the loss.