THIS CONTENT IS RESERVED FOR SUBSCRIBERS ONLYSecond seed Elena Rybakina, third seed Jessica Pegula and fourth-seeded Coco Gauff all advanced to the third round of the WTA 1000 tournament in Toronto on Wednesday. World number two Rybakina began the match by hitting six consecutive winners but also made 58 unforced errors. “I want to see better serve, the percentage,” Rybakina said after coughing up 16 double faults against 15 aces. Rybakina hit back-to-back double faults to drop the second set and three double faults while serving for the match before advancing to face 28th-seeded American Ann Li, who eliminated Canadian wildcard Kayla Cross 7-6 (7/2), 6-3. “For the first match it wasn’t too bad, but of course I want to improve,” Rybakina said.