I just try to concentrate on concentrating.

The tennis ball doesn't know how old I am. The ball doesn't know if I'm a man or a woman or if I come from a communist country or not. Sport has always broken down these barriers.

I've been active in animal rights and all kinds of environmental stuff and children's charities over the years.

Concentration is born on the practice court... you must mentally treat your practice sessions as matches, concentrating on every ball you hit.

When one man becomes more important than the country he's supposed to be leading, this will always create a problem.

What matters isn't how well you play when you're playing well. What matters is how well you play when you're playing badly.

Variety is what I would recommend: As variety is the spice of life in food, so it is in exercise. Change it up. But most of all, don't overdo it.