
Chompoothip, seeded 15th, ousted American Lorraine Guillermo 6-4 6-4 after one hour and 45 minutes while Plobrung, sister of national player Peangtarn, upset Indonesian national player Beatrice Gumulya, seeded ninth, 6-2 6-0 in just 71 minutes.
Other seven Thai players were eliminated on Saturday. Top seed Na Ri Kim of South Korea had a first round bye and will play Chinese Qianqian Zhao of China who beat Jessy Rompies of Indonesia 6-3 4-6 6-2. Second seed Emille Francati of Denmark beat Thai Jaipet Aontaweesil 6-1 6-3.
The first week of the US$25,00 Circuit features world No 297 Kawa Zatarzyna of Poland as the top seed with Chinese 306 th ranked Ran Tian and Russian 353 rd ranked Yana Sizikova as the second and third seed.
Kamonwan Buayam, No 383, is the Thai best hope in the tournament while former Wimbledon junior champion Noppawan Lertcheewakarn and teenage prodigy Bunyawi Thamchaiwat also join the field.