Defending champion Iga Swiatek of Poland made a strong start to her campaign at the U.S. Open, taking less than an hour to defeat Sweden's Rebecca Peterson. Swiatek won the match 6-0, 6-1 in just 58 minutes, leaving men's No. 10 seed Frances Tiafoe waiting to warm up before his own match on the same court. Swiatek showcased her dominance by holding a 4-0 advantage in aces and saving all three break points she faced. She also capitalized on five of six break-point opportunities. The World No. 1 is vying to win her second U.S. Open title and her fifth Grand Slam, following her recent triumph at the French Open. Swiatek expressed her satisfaction with her performance, stating that she aimed to play solidly and enjoy her time on the court. Next up for Swiatek is Australian Daria Saville, who defeated Clervie Ngounoue in straight sets. In other matches, No. 4 seed Elena Rybakina emerged victorious against Marta Kostyuk, No. 8 seed Maria Sakkari suffered an early exit at the hands of Rebeka Masarova, and Czech No. 10 seed Karolina Muchova cruised to victory over Storm Hunter.