Seventh-seeded Sara Errani of Italy kicked off the Madrid Open Saturday with a straight-set victory over Poland's Urszula Radwanska.
Top seeds Marion Bartoli and Dominika Cibulkova were beaten Tuesday in first-round matches at the Portugal Open.
American teen Taylor Townsend won in her debut on the WTA Tour Thursday, advancing to the second round of the BNP Paribas Open.
Marina Erakovic kept alive her hopes of a first WTA title Friday by reaching the finals of the U.S. National Indoor Championships.
Magdalena Rybarikova upset No. 1 seed Kirsten Flipkens Thursday to earn a semifinal berth at the U.S. National Indoor Championships.
Top-seeded Kirsten Flipkens advanced but No. 2 seed Sofia Arvidsson was upended in second-round matches Wednesday at the U.S. Indoor Championships.
No. 1 seed Kirsten Flipkens and defending champ Sofia Arvidsson each notched first-round wins Monday at the U.S. National Indoor Tennis Championships.
Kristina Mladenovic pulled off a first-round upset in Tuesday's action of the 21e Open GDF Suez tennis tournament in her hometown of Paris.
World No. 1 Victoria Azarenka opened her 2013 schedule with a straight-set, second-round win Wednesday at the Brisbane International tennis tournament.
Top 10 players Samantha Stosur and Caroline Wozniacki were beaten Monday in first-round matches at the Brisbane International tennis tournament.