Vera Zvonareva led the way as three seeds safely negotiated the first round of the Pattaya Open.

Russian Zvonareva, the top seed, beat Ksenia Pervak 6-3 6-2 and was joined in round two by fourth seed Yaroslava Shvedova and eighth seed Julia Goerges.

Shvedova overcame Ayumi Morita 6-2 6-4 while Goerges saw off qualifier Anna Gerasimou 6-4 6-4.

Home favourite Tamarine Tanasugarn cruised past Alla Kudryavtseva for the loss of three games but her fellow Thai Varatchaya Wongteanchai lost out 4-6 6-3 6-3 to Kai-Chen Chang, as did Suchanun Viratprasert against Sesil Karatantcheva and Nudnida Luangnam against Ekaterina Bychkova.

Italian Alberta Brianti did advance with a 6-4 4-6 6-1 defeat of New Zealand's Sacha Jones.