Coco Gauff Exits US Open After Fourth-Round Defeat to Emma Navarro

Gauff's title defense ends with a string of errors, while fellow Americans Tiafoe and Fritz advance.

Gauff committed 19 double faults and 60 unforced errors in her loss to Navarro.
This marks Gauff's second Grand Slam exit to Navarro this year, following Wimbledon.
Gauff hinted at potential coaching changes to address her serving issues.
Despite Gauff's exit, Frances Tiafoe and Taylor Fritz reached the men's quarterfinals.
Serena Williams remains the last woman to defend the US Open title successfully.