Coco Gauff underlined her credentials as one of the US Open title favourites with a gutsy victory over Caroline Wozniacki to reach the quarter-finals.
The 19-year-old American had to come back from a break down in the third set to win 6-3 3-6 6-1.
Sixth seed Gauff is bidding for a first Grand Slam title.
The victory also ended Wozniacki's extraordinary comeback run after a three-and-a-half-year absence from the sport.
Gauff arrived at her home Grand Slam full of confidence after title wins in Washington and Cincinnati.
Her fine form looks set to continue as she showed great resilience to fight back in the third set and wrestle momentum back from Wozniacki.