American wild cards Ahsha Rolle and Melanie Oudin also advanced.
None of the 32 seeded players have played in this 12-day tournament, all having received first-round byes.
Rolle advanced with a 6-2, 6-2 win over Madison Brengle and Oudin defeated Maret Ani 7-5, 6-2.
The defending champion is Daniela Hantuchova. Two of her three career titles have come at this tournament.