Iga Swiatek, No. 1 Seed at U.S. Open, Loses in Fourth Round

When Iga Swiatek, the No. 1 women’s player in the world, took the first set against Jelena Ostapenko on Sunday night, it seemed like business as usual. Swiatek, a four-time Grand Slam champion at 22, after all, was the reigning U.S. Open champion, and going into her match against Ostapenko, she had not dropped a