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Novak Djokovic of Serbia kisses the trophy during the awarding ceremony at the ATP World Tour Finals in London Elias Lindholm Hurricanes Jersey , on Nov. 16, 2014. Djokovic claimed the title when Roger Federer of Switzerland withdrew due to a back injury ahead of the final. (XinhuaHan Yan) Novak Djokovic of Serbia holds the trophy during the awarding ceremony at the ATP World Tour Finals in London, on Nov. 16, 2014. Djokovic claimed the title when Roger Federer of Switzerland withdrew due to a back injury ahead of the final. (XinhuaHan Yan) Novak Djokovic (L) of Serbia and Andy Murray of Britain pose ahead of their exhibition match at the ATP World Tour Finals in London, Britain on Nov. 16, 2014. (XinhuaHan Yan)
LONDON, Nov. 16 (Xinhua) -- World No. 1 Novak Djokovic won his fourth title at the ATP World Tour Finals here on Sunday without playing any tennis after six-time champion Roger Federer withdrew due to a back injury.


The Serbian also became the first player to win three straight season finale titles since Ivan Lendl from 1985-87.


Djokovic Brock McGinn Hurricanes Jersey , who also won at Shanghai in 2008, extended his winning streak at the tournament to 14 matches.


"We always give 100 per cent," said Djokovic holding the trophy. "I'm sure that if he could've played, he would've done. So I wish him the best in his recovery.


"This trophy is definitely the crown for all the achievements that I had this year. I'm very happy to be able to stand here and finish with this trophy."


Djokovic, who has finished year-end No. 1 in the ATP Rankings for the third time (also 2011-12), completed his season with a 61- 8 match record. He has won seven titles from 11 finals.


Federer, 33 Sebastian Aho Hurricanes Jersey , made the announcement of withdrawal to fans following the doubles trophy ceremony.


"Unfortunately, I'm not match fit to play the match tonight," said Federer on court. "Clearly I wish it wasn't so. I tried all year to be ready for the ATP World Tour Finals, and I didn't want it to end this way."