The top seed was made to work hard for his place in the last four, however, as he battled to a five-game triumph over Chun Seang Tan of Malaysia.

Hsu, third at the 2014 Asian Games in Incheon, lost the opening game and then fell 2-1 behind before recovering to win 6-11, 11-4, 13-15,11-5, 11-9.

The unseeded Malaysian was just one away from springing a surprise but ultimately the pressure told as he could not convert a glorious opportunity to prolong his stay in the competition.

India’s Sourabh Varma awaits for Hsu in the semi-finals after he beat Kento Horiuchi of Japan 7-11, 11-1, 11-3, 11-7.

Home representation in the other last-four contest tomorrow was guaranteed as fifth seed Lin Yu-hsien overcame compatriot Hsueh Hsuan-yi 11-6, 6-11, 11-6, 11-6.

Lin’s next opponent will be Malaysia’s Daren Liew, who defeated Indonesia’s Shesar Hir Rhustavito 11-8, 11-3, 11-2.

In the women’s singles, Japan’s Ayumi Mine, the third seed and the highest ranked player left in the draw, safely reached the semi-finals with a 11-9, 11-8, 11-9 victory against Lee Chia-Hsin of Chinese Taipei.

Pornpawee Chochuwong stands between Mine and a place in the final after the Thai player, seeded fifth, knocked out Jing Yi Tee of Malaysia, the second seed, 11-6, 11-7, 11-6.

There was a shock in one of the other quarter-finals as unseeded Japanese Saena Kawakami ended the title challenge of sixth seed Hana Ramadhini of Indonesia with a 11-5, 7-11, 11-9, 8-11, 14-12 success.

Kawakami’s reward is a meeting with team-mate Asuka Takahashi after she beat compatriot Yukino Nakai 11-8, 13-11, 11-9.