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The Thai pair, who came back from the brink of defeat to beat Chou Chia-Chi and Chen Hong-ling 17-21 21-10 21-14, next face Aparna Balan and Diju V of India.

In the men's singles, the country's No 2 Poompat Sapkulchananart edged out Scott Evan of Ireland 27-25 20-22 21-18.

Younger compatriot Pakkawat Wilailak went down to Indonesian Andre Kurniawan Tedjono 21-18 8-21 21-11.

In the women's singles, Thailand's No 1 Salakjit Ponsana went down 21-18 21-18 to her Japanese arch-rival Kaori Mori. Soratja Chansrisukot was beaten by another World No 12 Eriko Hirose, 21-11 21-17, while Monthila Meemek lost to Japanese Yu Hirayama 21-17 21-8.