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Novak Djokovic (R) of Serbia and Roger Federer of Switzerland pose for photos before their singles group match at the ATP World Tour Finals 2019 in London, Britain on Nov. 14, 2019. (Xinhua/Han Yan)
Highlights of singles group matches at ATP World Tour Finals 2019
Source: Xinhua| 2019-11-15 09:13:06|Editor: yhy
