NEW YORK, Sept. 4 (Xinhua) -- Following is the US Open men's singles quarter-finals line-up (prefix number denotes seeding):

1-Rafael Nadal, Spain vs 9-Dominic Thiem, Austria

3-Juan Martin del Potro, Argentina, vs 11-John Isner, United States

7-Marin Cilic, Croatia, vs 21-Kei Nishikori, Japan

6-Novak Djokovic, Serbia, vs John Millman, Australia

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