U.S. Open Day 4: Key Highlights and Upsets

The fourth day of the U.S. Open at Flushing Meadows was eventful with several key highlights. Notable results include Karolina Muchova's victory over Naomi Osaka, Tommy Paul advancing after Max Purcell's retirement, and Jessica Pegula defeating Sofia Kenin. Iga Swiatek cruised to the third round, while Elena Rybakina withdrew due to injury.

On the fourth day of the U.S. Open at Flushing Meadows, the competition saw significant upsets and key victories. Karolina Muchova ousted two-time champion Naomi Osaka in straight sets, while Tommy Paul advanced to the third round after Max Purcell retired due to injury.

Australian Alex de Minaur and Jessica Pegula also made strides, with De Minaur winning in straight sets and Pegula overcoming Sofia Kenin. Top seed Iga Swiatek effortlessly defeated Ena Shibahara, moving into the third round.

Elena Rybakina withdrew from the tournament due to injury, adding to the day's dramatic developments. As the weather remained pleasant, various players, including Jannik Sinner and Andrey Rublev, continued to battle for their spots in the next rounds.