Thailand take on reigning champions China while Japan battle it out against South Korea in the Uber Cup semi-finals on Friday at Impact Arena, Muang Thong Thani.
With the tie locked at 2-2, Busanan Ongbamrungphan clinched the decisive fifth match as the Thai women edged Indonesia in a thrilling quarter-final battle Thursday.
Earlier China defeated Denmark 3-1 to book their last-four spot.
Favourites Japan beat Taiwan 3-1, while South Korea, runners-up in 2016, also won by the same score against Canada.
In the Thomas Cup action, the Chinese men overwhelmed Taiwan 3-0 with victories from Chen Long, Liu Cheng/Zhang Nan and Shi Yuqi.
They await the winners of the late quarter-final match between the 2016 runners-up Indonesia and Malaysia.
In the other half, Japan were due to play France, while champions Denmark, led by top-ranked Viktor Axelsen, were due to play South Korea.
World No.4 Ratchanok Intanon got Thailand off to a good start as she comprehensively beat Fitrani Fitrani 21-8, 21-7.
Greysia Polii and Apriyani Rahayu put Indonesia on level terms after beating Jongkolphan Kittitharakul and Rawinda Prajongjai 21-11, 21-16 before Gregoria Mariska Tunjung defeated Nitchaon Jindapol 21-10, 22-20 to put her team ahead.
Puttita Supajirakul and Sapsiree Taerattanachai forced the fifth match with a 22-20, 21-12 win over Della Destiara Haris and Rizki Amelia Pradipta. Busanan then sealed the last-four spot for Thailand with a 21-19, 21-12 victory over Ruselli Hartawan in the final singles.
Meanwhile China and South Korea both rallied from the shock of opening match losses against Denmark and Canada to enter the last four.
Mia Blichfeldt led Denmark into battle against China and she stunned sluggish Chen Yufei 21-18, 13-21, 21-12 to raise the prospect of a massive upset against the 14-time Uber Cup champions.
A short while earlier, Michelle Li had achieved the same effect for Canada against South Korea, easing past Sung Ji-Hyun 21-14, 21-15.
Gao Fangjie restored order for the Chinese as she beat Line Kjaersfeldt 21-11, 21-11 in just 39 minutes.
World champions Chen Qingchen and Jia Yifan were just as dominant in the doubles against Sara Thygesen and Maiken Fruergaard, completing a 21-10, 21-13 victory in 34 minutes.
Former Olympic champion Li Xuerui then wrapped up the victory for China with an easy 21-7, 21-9 win over Natalia Koch Rohde.
"I was definitely better prepared today compared to (Wednesday's) group stage," said Li, who lost to Indonesia's Hartawan in the final group match on Wednesday.
"As for big match experience, I'm definitely superior in this department. There is a bit difference in our ability, so that's why I was more relaxed."
Meanwhile, South Korea were having a harder time dispelling Canada. Lee Jang-Mi had her hands full in quelling Rachel Honderich's determined fightback, needing an hour to emerge victorious at 21-13, 19-21, 21-15.
The Koreans quickly made it 2-1 with the two 18-year-olds, Baek Ha-Na and Lee Yu-Rim, decimating Michelle Tong and Catherine Choi 21-10, 21-7.
An Se-Young, South Korea's saviour in their group tie against Denmark, was up against Brittney Tam. The Canadian silenced the Korean camp by taking a close second game, but An asserted her superiority in the third to take the match 21-13, 19-21, 21-11.
Top-ranked Tai Tzu-ying won the first and only point for Taiwan as she defeated No.2 Akane Yamaguchi 21-19, 21-16. Yuki Fukushima and Sayaka Hirota (doubles), Nozomi Okuhara (singles) and Misaki Matsumoto and Ayaka Takahashi (doubles) then won their matches to put the tie beyond Taiwan's reach.
