Novak Djokovic and Rafael Nadal will lead a group of top tennis players in a charity soccer match to benefit the relief effort in Japan.
Roger Federer had another subpar showing, a 7-6 (8), 4-6, 7-6 (7) loss to Ivo Karlovic that left the 6-foot-10 Croat exulting on his back.
If you enjoy superstars and drama, Day 1 at the World Tour Finals was a good place to be, thanks to Rafael Nadal and Roger Federer.
For some players, the serve-and-volley game spills from the court into the media room. ESPN.com salutes the tours' top talkers, zingers and passing shots of 2010.
Spain begins its Davis Cup defense with one slight addition: Rafael Nadal. But a formidable Novak Djokovic-led Serbian team promises to be a stark challenger.