South Korea will face Thailand in the semi-finals of the Sudirman Cup after each won last-eight clashes today at the Carrara Sports and Leisure Centre in Gold Coast.
While South Korea were comfortable 3-1 winners against Chinese Taipei, Thailand were taking to the final rubber before a thrilling victory over Denmark.
The Danes, beaten finalists at the mixed team competition in 2011, led 2-1 after Viktor Axelsen's 21-15, 21-16 men's singles win over Tanongsak Saensomboonsuk was followed by a men's doubles success for Mads Pieler Kolding and Mads Conrad-Peterson over Bodin Isara and Nipitphon Phuangphuapet, 21-15, 21-6.
But 2013 world champion Ratchanok Intanon reduced the deficit with a 21-15, 21-14 success over Line Kjærsfeldt in the women's singles.
Jongkolphan Kititharakul and Sapsiree Taerattanachai then clinched the decisive women's doubles with a 21-15, 21-12 success over Kamilla Rytter Juhl and Christinna Pedersen.
Dechapol Puavaranukroh and Taerattanachai had earlier won the opening mixed doubles clash 21-19, 21-19 against Mathias Christiansen and Sara Thygesen.
South Korea proved too strong for a Taiwanese team including women's singles world number one Tai Tzu-ying.
Tai beat Sung Ji-hyun 21-14, 26-24 in the second rubber after Choi Sol-gyu and Seo Seung-jae overcame Lee Jhe-huei and Lee Yang 21-16, 12-14 in the opening mixed encounter.
However, the men's singles proved key as Son Wan-ho dug deep to win 13-21, 21-18, 23-21 over Chou Tien-chen.
Chang Ye-na and Lee So-hee then made victory certain by winning 21-13, 21-18 over Hsu Ya-ching and Wu Ti-jung.
The South Koreans will be chasing a first victory in the biennial event since 2003.
India will face China and Japan will play Malaysia in the other two quarter-finals tomorrow.