The mark of great sportsmen is not how good they are at their best, but how good they are their worst.

I can teach many sports, but obviously, tennis is the one. When you do other sports, you see things from different perspectives: different footwork drills, body positions, angles and geometry. All that stuff is helpful, and so when I do other sports, I can see things, because once you know one sport, then the other sport becomes more clear.

I tell you, if I was in the same position I was in 1975, trying to leave a communist country and trying to live a free life, America is not the country that I would think about going to considering how many rights the GOP is trying to take away.

Just by being out you're doing your part. It's like recycling. You're doing your part for the environment if you recycle; you're doing your part for the gay movement if you're out.

Whoever said, 'It's not whether you win or lose that counts,' probably lost.

Tennis is the purest form of democracy. There was a symbiotic, chicken-and-egg relationship for me between democracy and tennis.