NEW YORK, Sept. 4 (Xinhua) -- Following is the result of a U.S. Open men's singles quarterfinal match on Tuesday (prefix denotes seeding):

Men's Singles

Quarterfinal

3-Juan Martin del Potro, Argentina, bt 11-John Isner, United States, 6-7 (5), 6-3, 7-6 (4), 6-2

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