TORONTO: Second 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.

Australian Open champion Rybakina, of Kazakhstan, began her hardcourt run ahead of the US Open by outlasting Australian Daria Kasatkina 6-3, 5-7, 6-4 in 2hr 33min.

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.

“Today in key moments it worked, but still the percentage is quite low.

“I’m still adapting a bit to the jet lag and everything, so maybe my energy level could be better.”

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.

Pegula, who lost in a rain-delayed Washington final on Monday, was also extended in a 3-6, 6-3, 6-2 win over Poland’s Magdalena Frech.

“I was just happy with the way I was able to mentally stay in there,” said Pegula, who also beat Frech in the second-round in Washington a week ago.