The 16th-seeded Pavlyuchenkova got past Dominika Cibulkova 7-5, 7-5 in the first career singles meeting between the doubles partners.
The only other seeded player on Sunday's schedule was 2009 Pan Pacific runner-up Li Na but she was forced to withdraw with an illness. Her replacement, Maria Jose Martinez Sanchez, fell to Maria Kirilenko 6-3, 6-7 (5-7), 6-1.
Kaia Kanepi stopped Melanie Oudin 6-4, 6-4, Lucie Safarova defeated Kai-Chen Chang; Flavia Pennetta beat Christiana McHale 6-3, 6-1; and Daniela Hantuchova was a 6-3, 6-3 winner over Angelique Kerber as the premier-level tournament began main-draw play.
Also, both Bondarenko sisters won with Alona getting past Petra Kvitova 7-6 (10-8), 6-2 and Kateryna rolling by Anabel Medina Garrigues 6-2, 6-0.
Other first-round winners Sunday were Andrea Petkovic, Olga Govortsova, Tsvetana Pironkova and Greta Arn.
Arn, a tournament qualifier, earned a shot at world No. 2 Caroline Wozniacki in the second round with her Sunday win. Maria Sharapova won the event last year. She's the No. 12 seed in 2010.