Defending champion Coco Gauff says she needs to maintain her focus throughout her US Open fourth-round tie against Emma Navarro on Sunday after mentally 'collapsing' during her shock defeat by her at Wimbledon.
Third seed Gauff was upset by Navarro in the last 16 at the All England Club in July, losing in straight sets.
The pair meet in an all-American tie second on Arthur Ashe Stadium.
"I feel like that match at Wimbledon I think I mentally just literally collapsed on the court. I was very frustrated, and she played well," Gauff said.