Ratchanok Intanon and Pornpawee Chochuwong advanced to the quarter-finals of the US$420,000 Indonesia Masters in Jakarta yesterday.
Fifth seed Ratchanok needed three games to overcome Line Hojmark Kjaersfeldt 21-12, 17-21, 21-11 in the round of 16 of the BWF World Tour Super 500 event.
Ratchanok, who won the tournament in 2020, will play third seed An Se-Young, who won the India Open on Sunday.
An had to rally from a game down to defeat Putri Kusuma Wardani of Indonesia 18-21, 21-7, 21-10.
Pornpawee also found it tough against Zhang Beiwen before edging past the US player 13-21, 21-16, 21-19. She will play sixth seed Wang Zhiyi of China in the last eight today.
Another Thai hope Busanan Ongbamrungphan bowed out after losing to Carolina Marin of Spain 21-19, 21-13.
In the women's doubles event, Jongkolphan Kititharakul and Rawinda Prajongjai also progressed to the quarter-finals.
The fourth-seeded pair eased past American pair Francesca Corbett and Allison Lee 21-10, 21-9.
They will play seventh seeds Apriyani Rahayu and Siti Fadia Silva Ramadhanti of Indonesia in the last eight.
In the men's singles event, Indonesia's Jonatan Christie and China's Lu Guangzu both progressed.