我专注于一件事，而且只有这件事，那就是尽我所能地赢到越多冠军。
世界上充满了自童年以来从未以开放的心态面对开放之门的人。
"Tennis is a mental game. Everyone is fit, everyone hits great forehands and backhands."
The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all. And that, of course, causes great confusion.