Djoker wins fifth Tour Finals title
Novak Djokovic defeats Roger Federer in straight sets for his fifth ATP Tour Finals title.
Djokovic on his keys to success on the court
Novak Djokovic breaks down his performances in beating Roger Federer in straight-sets to capture his fourth consecutive year-end title.
Djokovic: I don't feel unbeatable
Novak Djokovic and Rafael Nadal talked to the press after Djokovic's 6-3 6-3 victory over Nadal at the ATP Finals in London.