Also Friday , second-seeded Vera Zvonareva of Russia overcame No. 8 seed Alize Cornet of France 7-5 , 6-1 ; third-seeded Agnieszka Radwanska of Poland beat No. 5 seed Nadia Petrova of Russia 6-3 , 6-2 ; while sixth-seeded Marion Bartoli of France was a 6-3 , 5-7 , 6-1 winner against unseeded Alona Bondarenko of Ukraine .