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Defending US Open Champ Novak Djokovic Retires in 3rd Set vs. Stan Wawrinka
8:20pm PDT - September 1st, 2019 djokovic - Bleacher ReportNovak Djokovic won't defend his U.S. Open title after retiring in the third set against Stan Wawrinka, who was up 6-4, 7-5, 2-1 in the Round 4 matchup. Wawrinka needed only one break to win the first set against the No...