Serena WilliamsShe didn't play tennis for a year, and then came back and is now playing as if nothing happened. The tears after her first win in Wimbledon said it all - she wants to be back on court and play tennis. And she wants it bad. You can't help but respect her determination. And forehand, too.
Honorable mention: Roger Federer, GOAT.
(Pics: Getty Images)
Also, I'm a day behind, so another post coming shortly.