NEW YORK -- Kyle Edmund has upset 20th-seeded American John Isner at the U.S. Open for his second win over a top-25 player in three matches.
The 21-year-old Edmund won 6-4, 3-6, 6-2, 7-6 (5) on Friday. He was playing in the third round at a major for the first time.
Isner, 31, is 3-6 in U.S. Open third-round matches. He had defeated the 84th-ranked Edmund in straight sets at this year's French Open.
Edmund beat 13th-seeded Richard Gasquet in the first round. Next up: No. 1 Novak Djokovic.
Isner had 27 aces, but he converted just 1 of 7 break points, while Edmund was 3 for 4.
At 5-5 in the fourth set, Isner led 0-30 when Edmund's serve was called in for an ace. Isner was out of challenges and argued to no avail that the chair umpire should have overruled it, dropping his racket to the court in frustration and fuming, "It was so far out."
Edmund went on to hold serve in that game then clinched the tiebreaker with a forehand winner.
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