Second-seeded Anastasia Pavlyuchenkova of Russia defeated Melanie Oudin of the United States 6-2, 7-6 (6) on Wednesday to reach the quarterfinals of the Monterrey Open hard-court tournament.
Top-seeded Jelena Jankovic of Serbia got off to a confident start to her tournament, downing Spain's Lourdes Dominguez Lino 6-4, 6-1 in their first round match.
In other important matches of the day, no. 8 Polona Hercog of Slovenia also reached the quarterfinals, defeating Barbora Zahlavova Strycova of the Czech Republic 6-4, 6-7 (4), 6-2. Sara Errani of Italy however, was knocked out in the second round by Greta Arn of Hungary 4-6, 7-5, 6-4.