Djokovic ends year on high with Finals win over Federer

By Martyn Herman LONDON (Reuters) - Novak Djokovic put the finishing touch to a magnificent season by beating Roger Federer 6-3 6-4 to win the ATP World Tour Finals on Sunday for the fifth time in his career. Federer brought the tournament to a close in anti-climactic fashion with a double-fault, although not as much as a year ago when he pulled out of the final with back injury. After a modest celebration, Djokovic walked back to his chair and wrote "And now for vacation" in Serbian on a camera