The thing about tennis is if you stay off for two weeks, or just for three days, you can lose your rhythm quickly. So it's just a question of constant diligence and vigilance.

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

When you get into that habit of winning, it gets - I don't know if you call it contagious - but it gets to be a habit. She's developed an unbelievable habit.

To stay interested in tennis, I have to mix it up with other things.

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.

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.

I tend to be slim and you know, I actually can lose weight quicker than I can gain it.