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Rafael Nadal of Spain returns a shot during the singles group match against Daniil Medvedev of Russia at the ATP World Tour Finals 2019 in London, Britain on Nov. 13, 2019. (Xinhua/Han Yan)
Rafael Nadal of Spain returns a shot during the singles group match against Daniil Medvedev of Russia at the ATP World Tour Finals 2019 in London, Britain on Nov. 13, 2019. (Xinhua/Han Yan)