Toronto: Top-seeded Coco Gauff routed Yafan Wang 6-4, 6-2 on Thursday in the second round of the National Bank Open.
Preparing for her U.S. Open title defense, Gauff played her first hard-court match since the Miami Open in April.
In the night session, second-seeded Aryna Sabalenka, the Australian Open winner, beat Yue Yuan 6-2, 6-2.
Elise Mertens edged Naomi Osaka 6-3, 6-4 in a late match. Osaka, a former No. 1 player with four Grand Slam titles, is returning to form following maternity leave.
Earlier, fourth-seeded Jelena Ostapenko outlasted Paula Badosa 3-6, 7-6 (3), 6-2. Badosa won the Washington title Sunday in her comeback from a back injury.
No. 5 Daria Kasatkina, No. 6 Liudmila Samsonova, No. 8 Emma Navarro and No. 10 Anna Kalinskaya advanced. No. 7 Madison Keys retired from her match against Peyton Stearns because of a thigh injury while down 3-0 in the third set.
Kasatkina beat Amanda Anisimova 6-4, 6-3; Samsonova topped Moyuka Uchijima 6-4, 6-2; Navarro beat Magda Linette 6-2, 6-4; and Kalinskaya edged Lesia Tsurenko 6-2, 6-2.
Canadian Leylah Fernandez, seeded 15th, dropped out with a 6-4, 6-2 loss to qualifier Ashlyn Krueger. Marina Stakusic, a 19-year-old wild card from nearby Mississauga, was thumped 6-0, 6-2 by Taylor Townsend.
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