Thrilling Upsets and Dominant Wins: Day Four Highlights at U.S. Open

The fourth day of the U.S. Open at Flushing Meadows saw significant victories and surprising upsets. Denmark's Caroline Wozniacki and Russia's Daniil Medvedev advanced, while past champion Naomi Osaka was knocked out by Karolina Muchova. The day was also marked by retirements and injuries among notable players.

Thrilling competitions marked the fourth day of the U.S. Open at Flushing Meadows. Former Australian Open champion Caroline Wozniacki defeated Renata Zarazua 6-3 6-3, advancing to face Jessika Ponchet in the third round.

Daniil Medvedev, the former champion and fifth seed, breezed past Fabian Marozsan 6-3 6-2 7-6(5), setting up a third-round match against 31st seed Flavio Cobolli. Meanwhile, Naomi Osaka, twice a champion, was sent packing by Czech Karolina Muchova in a 6-3 7-6(5) victory.

Heat and injuries also played a role, with several players, including Elena Rybakina and Karolina Pliskova, retiring due to physical issues. The day culminated with impressive performances from top seeds like Iga Swiatek and Coco Gauff, who cruised into the next rounds.