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.
The Serbian underlined his complete dominance of men's tennis with an immaculate display to become the first player in the year-ending tournament's 46-year history to triumph four times in a row.
After Federer brought the tournament to a close in anti-climactic fashion with a double-fault, Djokovic wrote "And now for vacation" on the camera lens in Serbian.
How he deserves it.
The 28-year-old has stomped through the season to leave his rivals trailing in his wake -- securing the year-end world number one ranking weeks before the London finale.
He won three of the year's four grand slams, beating the evergreen Federer in the Wimbledon and U.S. Open finals to take his career haul to 10, and would have celebrated the rarest of 'calendar year slams' had it not been for an inspired Stanislas Wawrinka in the French Open final.
Not only that but he won six of the year's Masters Series crowns and ended the year with an 82-6 win loss record -- half of those defeats coming against Federer, including in the group stages earlier in the week at the O2 Arena.
Federer, whose record 17 grand slams could come under threat from Djokovic, beat the Serb 7-5 6-2 on Tuesday to end his 23-match winning run and also inflict a first indoor loss on Djokovic for three years.
With the stakes raised though the 34-year-old made far too many errors on Sunday and Djokovic won with something to spare.
Federer's chances were few and far between.
He had the first break point in the second game but fluffed a forehand into the net.
In the next game a near-identical forehand found the net to give Djokovic the break and from there he never looked back.
The clinical Djokovic teased Federer into a volley error on set point in the ninth game to move ahead.
Federer, bidding for a record-extending seventh title at the year-ender, was staring at the abyss when he trailed 3-4 0-40 in the second set but escaped with five straight points.
Djokovic was unrelenting though and wore the 34-year-old Federer down with one brutal rally two games later, clinching victory on his second match point when Federer's second serve sailed long.
Djokovic has now leveled his head-to-head record with Federer for the first time in his career, at 22-22.
The previous day he also caught up with Rafael Nadal, beating the Spaniard to even their series at 23-23.
(editing by Justin Palmer)