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Serbia's Novak Djokovic serves during the men's singles third round match against Italy's Marco Cecchinato at the Shanghai Masters tennis tournament on Oct. 11, 2018. Novak Djokovic won 2-0. (Xinhua/Fan Jun)
Serbia's Novak Djokovic serves during the men's singles third round match against Italy's Marco Cecchinato at the Shanghai Masters tennis tournament on Oct. 11, 2018. Novak Djokovic won 2-0. (Xinhua/Fan Jun)