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Roger Federer joins Andy Murray in calling for more drug testing in tennis — but Novak Djokovic isn't so sure - Mirror Online
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Roger Federer meets Novak Djokovic at Wimbledon as old grudge simmers | Wimbledon 2012 | The Guardian
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Aug. 14, 2010 - Toronto, Ontario, Canada - 14 August, 2010: NOVAK DJOKOVIC (SRB) shows his frustration during a tennis match against ROGER FEDERER (SUI) at the 2010 Rogers Cup held at
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Roger Federer, Rafael Nadal And Novak Djokovic Feel Future Of Tennis Is "In Good Hands" | Tennis News
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Novak Djokovic says 'Big Three' rivalry with Roger Federer, Rafael Nadal a great promotion for tennis-Sports News , Firstpost
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