KOO Kien Keat-Tan Boon Heong advanced to the semi-finals but injury put an end to women's doubles Wong Pei Tty-Chin Eei Hui's progress in the Swiss Open last night.
Kien Keat-Boon Heong, the second seeds, defeated Michal Logosz-Robert Mateusiak of Poland 21-14, 21-17 in 30 minutes to reach a Super Series semi-finals for the first time this year.
The Malaysians will meet either All England champions Fu Haifeng-Cai Yun of China or England's Chris Adcock-Robert Blair in the last four today.
Kien Keat-Boon Heong had also scored a comprehensive 21-17, 21-16 win over Joko Riyadi-Candra Wijaya of Indonesia in the second round on Thursday.
Pei Tty and Eei Hui were supposed to meet South Koreans Ha Jung Eun-Kim Min Jung of South Korea late last night but a back injury to Eei Hui, said national singles coach Rashid Sidek, will see the World No 1 pair taking no further part in the tournament.
"Eei Hui suffered a recurrence of a back injury during the All England but she decided to continue.
"However, the pain became severe after the second round and she will only aggravate it further if she plays today (yesterday)," said Rashid.
"Kien Keat-Boon Heong have been playing much better here and I hope that they can maintain their run."
The withdrawal also means that Pei Tty-Eei Hui will lose their World No 1 status to Taiwan's Cheng Wen Hsing-Chien Yu Chin.
Wen Hsing-Yu Chin were involved in a late quarter-final clash against Lena Kristiansen-Kamilla Rytter Juhl of Denmark last night.
Pei Tty's run also ended in the mixed doubles where Fairuzizuan Tazari and she were beaten 21-18, 21-8 in 31 minutes by Olympic champions Lee Yong Dae-Lee Hyo Jung of South Korea in the quarter-finals.