LINZ, Austria, Oct. 23 (UPI) -- Ana Ivanovic and Vera Zvonareva, the tournament's top two seeds, earned quarterfinal berths Thursday at the Generali Ladies Linz in Austria.
Ivanovic, a former world No. 1, coasted past Sybille Bammer 6-4, 6-2 and Zvonareva was an easy 6-2, 6-0 winner over qualifier Nuria Llagostera Vives. Zvonareva was the bronze medal winner at this year's Olympics.
Fourth-seeded Alona Bondarenko became an upset victim, falling to Patty Schnyder 6-2, 2-6, 6-1. Schnyder reached the finals here last year before losing to Daniela Hantuchova.
No. 6 seed Marion Bartoli advanced by holding off Petra Kvitova 7-6 (7-4), 1-6, 6-3 and Flavia Pennetta was a 6-3, 6-1 victor over Dominika Cibulkova.
Pennetta was the runner-up at last week's tour stop in Zurich.
