MADRID (AP) After only three Rafael Nadal-Roger Federer matches in two seasons, tennis fans will get two straight doses of the sport's biggest rivalry come Christmas.
Nadal announced on Friday the two will play a charity match for Africa in Zurich on Dec. 21, then the next day in Spain for Nadal's charity foundation.
Nadal says they ``wanted to take advantage of our head-to-head rivalry over recent years ... and help people who need it.''
The top-ranked Nadal, who will play the Paris Masters before closing with the ATP World Tour Finals in London, says he is feeling some fatigue from a successful season in which he won the French Open, Wimbledon and the U.S. Open.