Svetlana Kuznetsova of Russia advanced to the third round of the Pan Pacific Open by beating third-seeded Sara Errani of Italy 6-4, 6-4 on Tuesday.
Kuznetsova, a two-time major winner, hit seven aces in the match and will next face 15th-seeded Sorana Cirstea of Romania. Cirstea beat Japanese wild-card entry Misaki Doi 6-1, 6-2.
In other second-round matches, Eugenie Bouchard of Canada defeated ninth-seeded Sloane Stephens of the United States 5-7, 7-6 (7), 6-3. Bouchard will next play sixth-seeded Jelena Jankovic of Serbia, who beat Ayumi Morita of Japan 6-4, 6-1.
Other winners include Samantha Stouser of Australia, Ana Ivanovic of Serbia, Dominika Cibulkova of Slovakia and Madison Keys of the United States.