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Roger Federer and Novak Djokovic face winner takes all battle to reach ATP Finals semis | Tennis | Sport | Express.co.uk
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ATP World Tour Finals 2015 - Djokovic rules with record win - The Championships, Wimbledon - Official Site by IBM
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Roger Federer vs Novak Djokovic during the Singles Final of the 2015 Barclays ATP World Tour Finals - O2 Arena London England. 22 November 2015 Stock Photo - Alamy
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Federer to face Djokovic in group stages in ATP World Tour Finals as Nadal handed Ferrer test | Daily Mail Online
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US Open Tennis Championships - He wins again! Novak Djokovic beat Roger Federer to win his fourth consecutive ATP World Tour Finals title and cap one of the greatest seasons in history.
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