Sep 4, 2021; Flushing, NY, USA; Novak Djokovic of Serbia after beating Kei Nishikori of Japan in a third round match on day six of the 2021 U.S. Open tennis tournament at USTA Billie Jean King National Tennis Center. Mandatory Credit: Robert Deutsch-USA TODAY Sports
NEW YORK (Reuters) - After tackling two U.S. Open debutants, Novak Djokovic faced an old foe on Saturday, reaching the fourth round with a 6-7(4) 6-3 6-3 6-2 win over Kei Nishikori to stay on course for a record 21st major title that would complete the calendar Grand Slam.
Following first-ever meetings with Denmark's Holger Rune and Dutchman Tallon Griekspoor, Djokovic faced a seasoned campaigner in Nishikori, who was runner-up at the 2014 U.S. Open having beaten the Serb to move into that year's final.
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