World number one Jannik Sinner advanced to the fourth round of the U.S. Open with a dominant victory over Christopher O'Connell, winning 6-1, 6-4, 6-2. Sinner's win comes after the surprising early exits of top rivals Novak Djokovic and Carlos Alcaraz, making the Italian a favorite for the men's title. Sinner showcased a flawless serve, hitting 15 aces and 46 winners, and did not face a single break point. He will face either Tommy Paul or Gabriel Diallo in the next round. Meanwhile, Iga Swiatek also progressed to the fourth round, bolstered by a pep talk from Serena Williams, and dismissed Anastasia Pavlyuchenkova 6-4, 6-2. This marks the first Grand Slam without Djokovic, Federer, or Nadal in the Round of 16 since 2004.