LINZ, Austria — Top-seeded Ana Ivanovic and No. 2 Vera Zvonareva had comfortable victories today to reach the quarterfinals of the Generali Ladies.

The fourth-ranked Ivanovic downed Sybille Bammer of Austria 6-4, 6-2, while Zvonareva routed Nuria Llagostera Vives of Spain 6-2, 6-0.

Ivanovic dropped serve twice in the opening set, but finally settled down after breaking Bammer for a third time at 4-4.

Ivanovic will play seventh-seeded Flavia Pennetta of Italy, who defeated Dominika Cibulkova of Slovakia 6-3, 6-1. Pennetta reached the final of the Zurich Open last week.

Zvonareva dropped serve in the opening set against Llagostera Vives and saved five more break points, but was in control afterward.

The Russian is next up against No. 8 Alize Cornet.

Sixth-seeded Marion Bartoli of France also advanced after beating Petra Kvitova of Czech Republic 7-6 (4), 1-6, 6-3.