Zvonareva, Kirilenko into third round
World number eight Zvonareva faced stiff resistance at times from Amanmuradova, giving up six break points and losing her serve twice, but she broke the world number 107 five times to wrap the win.
Russia's Maria Kirilenko is also in the third round after winning a thriller against Australia's Anastasia Rodionova. Fourth-seeded Kirilenko lost the opening set but fought back in the second set and eventually took the match on a tie-break, winning 2-6 6-3 7-6(3).
Seventh seed Sorana Cirstea breezed past Japan's Misaki Doi 6-2 6-2, while Thai veteran Tamarine Tanasugarn ensured that there would be some local representation in the third round with a 7-6(7) 6-3 win over Taiwan's Chang Kai-Chen.