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Later, I discovered there was a lot of work to being good in tennis.

I have always believed that my job is to try and give my best on the tennis courts.

I've been very focused on my career outside of tennis.

If you can react the same way to winning and losing, that's a big accomplishment. That quality is important because it stays with you the rest of your life, and there's going to be a life after tennis that's a lot longer than your tennis life.

I just try to stay positive and focused on the tennis, not let anything get to me, like crazy questions. But I'm tough, let me tell you, tough as nails.

With everything else that would swirl around me when I got involved in it, tennis was my main concern.

I did a really good job of sticking to the tennis court.

Tennis is my life, obviously; I need to focus, I need to win. But it's not the only thing. I'm not going to play forever.

Tennis has given me this wonderful life and I'm very grateful for it.

When you do something best in life, you don't really want to give that up - and for me it's tennis.