U.S. Open tennis: Swiatek, Sinner sweeps, Alcaraz, Hurkacz upsets highlight Day 4

Top-ranked Iga Swiatek and Jannik Sinner breezed through their second-round matches, while Carlos Alcaraz and Hubert Hurkacz suffered upset losses on Day 4 of the 2024 U.S. Open. The Grand Slam will run through Sept. 8.