Caroline Wozniacki has advanced to the fourth round of the US Open, marking a significant comeback since her retirement in 2020. She attributes her return to the sport partly to the inspiration and support of Serena Williams, her close friend and former competitor. Despite an injury scare in the second round, Wozniacki triumphed over Jessika Ponchet, becoming one of the few women aged 34 or older to reach the fourth round in the Open Era. Williams, who made a public appearance at the tournament as a spectator, did not attend Wozniacki's third-round match, prompting a humorous response from the Danish player. The friendship between Wozniacki and Williams remains strong, with Wozniacki expressing gratitude for Williams' influence on her career and women's tennis in general.