Coco Gauff, 22, advanced to the US Open quarter-finals with a straight-sets victory over fellow American Iva Jovic, 18, on Labour Day. The match, which lasted one hour and 33 minutes, saw Gauff win 6-1, 6-4. This sets up a crucial clash in the last-eight stage against Mirra Andreeva, the French Open champion, whom Gauff has defeated in all five of their previous encounters. The match began with a quick break of serve by Jovic, who capitalized on a double fault by Gauff in the first game. However, Gauff quickly regained her composure, winning the next six games to take the first set. In the second set, Jovic managed to hold her serve initially but was broken to 3-2 after a series of strong plays from Gauff. Gauff then broke Jovic to love and secured the match, continuing her perfect record in the tournament by not dropping a single set so far. Gauff praised her opponent, saying, "Iva's an incredible player, an incredible talent, she plays beyond her years. I'm used to being the younger American!" Meanwhile, two-time former US Open champion Naomi Osaka announced she is dealing with an Achilles injury after being defeated 6-1, 6-4 by Kazakhstan’s Elena Rybakina. Osaka revealed she had undergone two ultrasounds and planned to get an MRI to better understand the extent of the injury. Her early exit from the tournament adds to the challenges she has faced in recent years. In the men's draw, 20-year-old Learner Tien, the 14th seed, was defeated in a grueling five-set match by Russian Karen Khachanov. Frenchman Arthur Gea, a lucky loser who qualified for the main draw through wild-card entries, had a match point in the third set but ultimately fell to Dutchman Botic van de Zandschulp in a five-set battle. This marked the first time a lucky loser had reached a grand slam quarter-final in the Open era, though Gea was unable to capitalize on his opportunity.