Third-seeded Maneepong Jongjit and Nipitphon Puangpech squandered several chances to wrap up the second game and went down to Shin Baek-choel and Yoo Yeon-seong of South Korea 21-17 22-20 in the men’s doubles.
The Thais were having a game point at 20-19 but failed to summon their A game at the crucial point and lost the match. It was the third appearance in a semi-final this season for the pair, who also failed to beyond the last-four stage in Germany and India.
Earlier second seed Sudket Prapakamol and Saralee Thoungthongkam were upset by South Korean fourth seed Shin Baek-choel and Jan Ye-na 21-11 21-12.