LONDON — There is one more match to play this season, and there is plenty riding on it for both Novak Djokovic and Roger Federer.
Djokovic, who has had the best season of his career with three Grand Slam titles, is looking to cap his incredible year by becoming the first man to win four straight titles at the ATP finals. Federer, however, can add to his record six titles on Sunday while also proving he can still beat the top-ranked Serb in big matches.
"When he's on, it's hard to play him," Djokovic said of Federer, who has reached his 10th final at the season-ending tournament for the top eight players in the world.