U.S. Open ATP results

NEW YORK, Sept. 4 (Xinhua) -- Following are the ATP results of the U.S. Open at USTA Billie Jean King National Tennis Center on Saturday (prefix number denotes seeding):

Men's singles third round

Oscar Otte, Germany, bt Andreas Seppi, Italy, 6-3, 6-4, 2-6, 7-5

6-Matteo Berrettini, Italy, bt Ilya Ivashka, Belarus, 6-7 (5), 6-2, 6-4, 2-6, 6-3

1-Novak Djokovic, Serbia, bt Kei Nishikori, Japan,