Woz, Serena Share Marathon Moment

Wozniacki Proud Of Getting Through Marathon (0:41)

Caroline Wozniacki comments on her experience running in the New York City Marathon. (0:41)

Caroline Wozniacki has done a lot as a tennis player. As a marathoner? Not much.

At least not before Sunday, when the Danish 22-time WTA winner completed the New York City Marathon in 3 hours, 26 minutes, 33 seconds -- and was greeted by an emotional tennis rival/BFF Serena Williams.

May the Woz/Serena friendship never stop. And may the spirit spread to other sports. (We're looking at you, Serge and Blake.)