Chou outclassed Vitidsarn, the 2023 world champion and Paris Olympic silver medallist, in straight games and will next face Chinese third seed and world No 2 Shi Yuqi.

Shi rallied from a set down to defeat compatriot and fifth seed Li Shifeng 15-21, 21-15, 21-11.

Denmark’s second seed Anders Antonsen overcame France’s Toma Junior Popov 19-21, 21-12, 21-8 to cruise into the semi-finals, where he will meet China’s Wang Zhengxing.

In the women’s singles, South Korean top seed An defeated Chinese fifth seed Chen Yufei 21-18, 21-19.

An, 23, who won Olympic singles gold in Paris, will next face Chinese fourth seed Han Yue, who overcame Indonesian eighth seed Gregoria Mariska Tunjung 21-19, 21-18 in a tightly contested encounter.

Chinese second seed Wang Zhiyi eased past Taiwan’s Chiu Pin-Chian 21-16, 21-11 to secure a semi-final clash with Japanese third seed and former world champion Akane Yamaguchi, who defeated India’s Unnati Hooda in straight sets.