Taiwan's Hsu Jen Hao dispatched Malaysia's Chong Wei Feng in straight games to advance to the quarter-finals of the Thailand Open in Bangkok.
Hsu, the third seed, briefly trailed in the first game, but pulled away after going on a six-point winning streak to eventually win it 21-15.
Having gotten his nose in front, Hsu took total control of the second game to seal a comprehensive 21-15, 21-10 victory.
Hsu moves on to face eighth seed Kenta Nishimoto of Japan, who beat Yang Chih Chieh 21-12, 25-27, 21-15.
Also advancing was Thai fifth seed Tanongsak Saensomboonsuk, 21-18, 21-19 over Panji Ahmad Maulana, and second seed Sony Dwi Kuncoro of Indonesia, who beat Pannawit Thongnuam 24-22, 21-13.
Malaysia's Daren Liew also reached the last eight with a 22-20, 21-14 upset victory over fourth seed Boonsak Ponsana.
There was another big upset in the women's draw, as Thai second seed Porntip Buranaprasertsuk went down 21-16, 16-21, 21-17 to Malaysia's Jin Wei Goh.
Goh moves on to face countrywoman Yen Mei Ho, who was another surprise winner over Japanese fifth seed Yui Hashimoto, 21-19, 14-21, 21-16.
Other women to reach the quarter-finals included Thai duo Busanan Ongbamrungphan and Nitchaon Jindapol, the third and fourth seeds, and Malaysian sixth seed Jing Yi Tee.