The pair, who were crowned US Open champions on Sunday, defeated compatriots and sixth seeds Ong Yew Sin and Teo Ee Yi 25-23, 21-15 in the second round at Jinnam Stadium.

However, the big test for the 46th-ranked pair in the quarterfinals are top seeds Fajar Alfian and Rian Ardianto of Indonesia, who defeated Taiwanese duo Lu Ching Yao and Yang Po Han 21-19, 21-15.

Following Sze Fei-Izzuddin into the quarterfinals is national men’s singles player Ng Tze Yong, who easily beat Hong Kong’s Angus Ng 21-18, 21-17.

Tze Yong will face fourth seed Loh Kean Yew of Singapore, who advanced with a 21-19, 17-21, 21-6 win over China’s Zhao Junpeng.

Four other national representatives were shown the exit in the second round.

Women’s singles player S Kisona struggled before losing 22-20, 14-21, 14-21 at the hands of tournament top seed Akane Yamaguchi of Japan, while the doubles team of Pearly Tan and M Thinaah suffered the same fate at the hands of Chinese pair Chen Qing Chen and Jia Yi Fan when they went down 17-21, 21-17, 19-21.

Mixed doubles pair Tan Kian Meng and Lai Pei Jing lost 9-21, 7-21 to the second seeds from Thailand, Dechapol Puavaranukroh and Sapsiree Taerattanachai.

Another mixed doubles pair, Goh Soon Huat and Shevon Jemie Lai also went down 17-21, 13-21 to Japanese pair Hiroki Midorikawa and Natsu Saito.

Top national men’s doubles duo Aaron Chia an Soh Wooi Yik, who were seeded fourth, lost 21-19, 18-21, 19-21 to Keiichiro Matsui and Yoshinori Takeuchi.

The Japanese pair will meet South Koreans Kang Min-hyuk and Seo Seung-jae, who earlier beat compatriots Jin Yong and Na Sung-seung 24-26, 21-15, 21-18, in the quarterfinals tomorrow.

Meanwhile women’s singles shuttler K Letshanaa was trounced by world No 4 Tai Tzu Ying of Taiwan 21-15, 21-5.

Tzu Ying will next face off against Zhang Yi Man of China, who stopped compatriot Han Yue 21-10, 21-17.