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17th November 2019 O2 Arena, London, England; Nitto ATP, Tennis Herren Tennis Finals; Stefanos Tsitsipa
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Tennis - ATP Finals - The O2, London, Britain - November 14, 2019 Switzerland's Roger Federer in action during his group stage match against Serbia's Novak Djokovic REUTERS/Toby Melville Stock Photo - Alamy
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