US Open—New York, NY, U.S.A.
Fourth-round results:
(1) Rafael Nadal Defeats Alexandr Dolgopolov 62 64 61
(3) Roger Federer Defeats (33) Philipp Kohlschreiber 64 62 75
(24) Juan Martin del Potro Defeats (6) Dominic Thiem 16 26 61 76(1) 64
Andrey Rublev Defeats (9) David Goffin 75 76(5) 63
