Kuala Lumpur (1/22) -Koo Kien Keat and Tan Boon Heong survives a scare in Malaysia Open quarter-final after beating English Nathan Robertson and Anthony Clark in three sets, 21-12, 23-25, and 21-11.
Playing in the last match in Stadium Putra, the top seeds needed 55 minutes to reach the last 4. They will face Chinese Zhang Nan and Chai Biao who defeated Naoji Kawamae and Shoji Sato of Japan 21-11, 21-16.
"It was good to win but I am still not at my best. I really hope to be in better form," said Boon Heong.
"On paper, we have advantage. We have beaten them twice but it is not our style to take anyone lightly," said Kien Keat, who had won Malaysia Open 2005-2006 with Chan Chong Ming.
"What is important is for us to play our game. Hopefully, we will get through. "
The other semifinal will be between Guo Zhendong/Xu Chen and fourth seeds Hendra Gunawan/Alvent Yulianto. Previously Hendra and Alvent defeated Tony Gunawan and Howard Bach 21-15, 21-18 while Guo/Xu overcame Kenichi Hayakawa/Kenta Kazuno 21-17, 23-21.
In the women's singles, Japanese Eriko Hirose reaches the semis after stunning second-seeded Wang Lin 21-19, 15-21, and 21-19.
"I had long rallies with Wang Lin today and tried to keep pace so I could force errors out of her," said Hirose who will meet Wang Xin in the semis.
Top seed Wang Yihan and Bae Youn-joo also advance to the semi-final. Youn-joo ousted compatriot Sung Ji-hyun 21-13, 21-19, whereas Wang Yihan defeated fifth seed Jiang Yanjiao 21-13, 21-17.
Thailand's Boonsak Ponsana successfully progresses to the men's singles semi-final after an easy 21-14, 21-9 win over Malaysia's Chong Wei Feng. He will face second seed Peter Gade.