They lost to the 8th-ranked pair Sabar Karyaman Gutama-Reza Pahlevi Isfahani 18-21, 21-12, 18-21 in a 59-minute match that was marred by the crowd booing each time the Malaysians served.

The defeat was their second in three encounters between the two pairs, and dashed Wei Chong-Kai Wun’s hopes of winning another title in Jakarta this year after the Indonesia Master’s victory in January.

Despite the loss, Wei Chong-Kai Wun can hold their heads high as this is their fourth semi-final appearance while they have also won two titles this season, the Indonesia Masters and Malaysia Masters.

They have so far won five career titles and were runners-up three times, including in the World Tour Super 1000 series Indonesia Open last year.

As beaten semi-finalists in the Indonesia Open, the Malaysian duo take home US$20,300 (RM85,898).

In tomorrow’s final, the Indonesian pair will either face compatriots Fajar Alfian-Rian Ardianto or Kim Won Ho-Seo Seung Jae from South Korea.