( CNN ) -- World No.1 Caroline Wozniacki came through her opener against Nadia Petrova at the WTA Qatar Open after a string of seeded players crashed out Wednesday . Wozniacki , fresh from her triumph in Dubai , had little trouble against 2006 champion Petrova , running out a 6-3 6-2 winner in their second round match . `` It 's great to start off with a win and continue with my good form after Dubai , '' the Dane told the official WTA website . She secured a single break in the opener to move ahead and three breaks of service in the second . Her victory sets up a quarterfinal clash against Italian Flavia Pennetta at the Khalifa Tennis and Squash Complex . Penetta 's compatriot and third seed Francesca Schiavone became the biggest casualty yet as she was beaten 7-5 6-3 by China 's Peng Shuai . Schiavone , the reigning French Open champion , complained of tiredness after her defeat . Fourth-seeded Li Na , the Australian Open finalist , crashed to a 6-2 6-1 loss to Czech Klara Zakopalova , while eighth seed Shahar Peer of Israel was thrashed 6-1 6-0 by France 's Marion Bartoli . `` She gave me no chance , '' said Peer , who had beaten two-time grand slam champion Svetlana Kuznetsova in the first round . `` I have won seven out of nine times against her in the past , but today she was simply too good . '' Second seed and World No.3 Vera Zvonareva also avoided an upset as she swept aside Dominika Cibulkova 6-1 6-2 in the final match of the day . Russian Zvonareva showed no signs of a recent niggling shoulder injury to stay on course for a final clash with Wozniacki .
Caroline Wozniacki continues winning streak by beating Qatar in Qatar . Dane comes to Doha off the back of her Dubai Open success . Third seed and Czech Open champion Francesca Schiavone loses to Peng Shuai . Third seed Dane reaches quarterfinals by beating Doha .