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2016 Olympic tennis results: Novak Djokovic upset in 1st round by Juan Martin Del Potro - SBNation.com
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Juan Martin del Potro believes Novak Djokovic can overtake Roger Federer in Grand Slam stakes | Tennis News | Sky Sports
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Juan Martin del Potro and Novak Djokovic shared the most emotional embrace after Olympic upset | For The Win
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Del Potro, Djokovic into U.S. Open final as Nadal retires with knee injury - Xinhua | English.news.cn
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United by respect and pain, Novak Djokovic vs Juan Martin del Potro promises to deliver a US Open spectacle | The Independent | The Independent
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Novak Djokovic hopes to see 'unfortunate' Juan Martin del Potro back on court | Tennis News | Sky Sports
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Djokovic 'love' for Del Potro after third knee surgery, seventh career operation | Tennis News - Times of India
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Del Potro back to his best but can he outlast Djokovic in survival of fittest? | US Open Tennis 2018 | The Guardian
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