Emma Navarro upset defending champion Coco Gauff 6-3 4-6 6-3 to move into the U.S. Open quarter-finals on Sunday, beating her fellow American for the second time in a Grand Slam this year.
Gauff had been looking to avenge her defeat by Navarro at Wimbledon, where she lost in the fourth round, but the 13th seed was high on confidence as she stunned the Arthur Ashe Stadium crowd with a dominant all-round display.
Gauff was her own worst enemy, however, especially on serve where the 20-year-old third seed struggled and had 19 double faults and 60 unforced errors.
Navarro's victory moved her into a second Grand Slam quarter-final where she will play Spain's 26th seed Paula Badosa, while defeat for Gauff will see her drop out of the top five in the world rankings.
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