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			 The Serb, virtually guaranteed a semi-final berth before walking 
			on court at the O2 Arena, made doubly sure by cruising past Berdych 
			in little more than an hour. 
 He will meet Japan’s Kei Nishikori in Saturday’s first semi-final 
			before Roger Federer plays his Swiss compatriot Stanislas Wawrinka 
			in the evening match, following Wawrinka’s 6-3 4-6 6-3 victory over 
			Marin Cilic on Friday.
 
 A day after Roger Federer dropped only one game beating home 
			favourite Andy Murray to win Group B, Djokovic was also in ruthless 
			mood to top Group A and guarantee ending the year as world number 
			one for the third time.
 
 Seven-times grand slam champion Djokovic has now topped the closing 
			standings for three of the last four years.
 
			
			 "To be able to stand next to this trophy and to have the crown for 
			all the achievements in this 12 months, it's very fulfilling and 
			it's a joy," Djokovic said after being presented with the year-end 
			number one trophy in front of a parade of former world number ones 
			including his coach Boris Becker.
 "The tournament is not over. I have maybe a few hours of celebration 
			and then turning back to the semi-finals and preparing for it."
 
 Djokovic's 30th indoor victory in succession since the ATP World 
			Tour Finals in 2012, lined up another meeting with Nishikori after 
			the Japanese debutant finished second in Group B.
 
 SUBLIME LEVEL
 
 After a series of one-sided encounters throughout the week, 
			Berdych’s capitulation felt like no great surprise as he slipped 4-0 
			behind in the opening set against a man playing at a sublime level.
 
 "I think it just shows how great he is, how well he has played 
			during the whole season," Berdych said of Djokovic's confirmation as 
			year-end number one.
 
 Later on Friday, Wawrinka set up a meeting with Federer, his partner 
			in the Davis Cup final for Switzerland next weekend, needing just 12 
			minutes to win the three games which guaranteed a semi-final place 
			for a second year running.
 
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			Fresh from breaking Cilic’s serve to move into that 3-1 lead, 
			Wawrinka looked sharp and in no mood to let up, taking the first set 
			in 32 minutes. It looked odds on that an 11th encounter among the 12 
			round-robin matches would not go beyond two sets.
 Instead, the rarity of a proper contest breaking out suddenly 
			materialised when Wawrinka threw in an absent-minded service game at 
			4-5 in the second set, getting broken to love.
 
 In the decider, Wawrinka, perhaps already thinking ahead to the 
			Federer game, seemed even more distracted as was again immediately 
			broken but he regrouped and broke back, reeling off four straight 
			games to prevail after one hour 45 minutes.
 
 By the end Australian Open champion Wawrinka was playing with some 
			of the panache he will need to earn a rare win over Federer, who 
			leads 14-2 in their head-to-heads, and Cilic finally capitulated 
			with a double fault on the final point.
 
 It was one of the better games of a tournament which has had more 
			than its share of flat spots but the sell-out crowds will be hoping 
			for a couple of closer semi-finals with the alluring prospect of a 
			Djokovic-Federer final showdown on Sunday.
 
 (Additional reporting by Ian Chadband; editing by Ken Ferris)
 
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