Shortly after parting ways with her coach, Patrick Mouratoglou, Naomi Osaka announced that she would be working with Tomasz Wiktorowski on a trial basis.

Clara Tauson of Denmark upset second-seeded Wimbledon champion Iga Swiatek of Poland 7-6 (1), 6-3 on Sunday night to reach the National Bank Open quarterfinals. The 6-foot Tauson, seeded 16th ...