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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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Tennis: Novak Djokovic: "Roger Federer set the standard for what it means to achieve excellence" | Marca
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I Hope That We Can See Him Play At Least Another Time" - Novak Djokovic Hopeful of Seeing Roger Federer Play for Another One Year - Sportsmanor
Tennis Guru - The Tennis Gurus 🎾 👑 Andy Murray Rafa Nadal Roger Federer Novak Djokovic #lavercup #nadal #murray #federer #Djokovic | Facebook
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Novak Djokovic and Roger Federer face off with Wimbledon memories fresh | ATP World Tour Finals | The Guardian
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federer: Big Three: Roger Federer, Rafael Nadal, Novak Djokovic set new bar for next generations - The Economic Times
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Novak Djokovic wants biggest rivals at his swansong similar to Roger Federer send-off | Tennis News | Sky Sports
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