Top seeded Argentine Gisela Dulko registered a convincing 6-2, 6-3 win over Czech Sandra Zahlavova in just 70 minutes to reach the semifinals of the 2010 Copa BBVA Colsanitas, being played here in Bogota, Columbia.

Meanwhile, third seeded Italian Sara Errani suffered a shocking defeat at the hands of Spaniard Arantxa Parra Santonja, losing 7-5, 6-2 in an 84 minute match to bow out of the event.

In another quarterfinal match from the day, German Angelique Kerber edged past Frenchwoman Pauline Parmentier 6-1, 6-4 to move to the last four.

Unseeded Columbian Mariana Duque Marino kept the home fans' hopes alive when she took out Czech seventh seed Klara Zakopalova 6-0, 7-6(4) to reach her maiden Sony Ericsson WTA tour semifinals.