(CNN) -- Ana Ivanovic was ousted from the Australian Open in the second round by Argentina's Gisela Dulko, losing in a three-set thriller.
Ivanovic, the No. 20 seed at the year's first Grand Slam in Melbourne, won the first set that ended in a tiebreak 7-6 (8-6), but lost the last two sets, 5-7, 4-6.
In other women's play on Thursday, Victoria Azarenka, Agnieszka Radwanska and Na Li advanced to the third round.
Others who have booked their spots in the third round include wildcard Justine Henin -- who dismissed fifth seed Elena Dementieva, Kim Clijsters (15), Svetlana Kuznetsova (3) and Victoria Azarenka (7).