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.

Ukraine’s top-ranked tennis player Elina Svitolina (WTA No. 13) has advanced to the quarterfinals of the WTA 1000 hard-court tournament in Montreal, Canada.