Irina-Camelia Begu advances
Need the scores from any match played in today's tournaments? Results
Begu, ranked 10 spots behind the 63rd-ranked Hercog, saved three set points in the tiebreaker.
Earlier on the red clay courts at the Country Time Club, seventh-seeded Alize Cornet of France beat Mariana Duque Marino of Colombia, 6-3, 6-2; Alexandra Cadantu of Romania eliminated Kiki Bertens of the Netherlands 6-3, 6-2; and Lourdes Dominguez Lino of Spain defeated Yulia Putintseva of Kazakhstan 6-2, 6-4.
French Open runner-up Sara Errani is the tournament's top seed.
Copyright 2012 by The Associated Press