Taipei, Sept. 21 (CNA) Chien Yu-chin and Cheng Wen-hsing became Taiwan's only medal hope in the 2007 Yonex Taipei Badminton Open after a quarterfinal win, beating South Korea's Ha Jung-eun and Kim Min-jung 21-16, 21-13 to advance to the women's doubles semifinals Friday.
Upsets highlighted the day in the men's singles as top two seeds were knocked out in the quarterfinals. China's top seed Chen Hong lost to Hidayat Taufik of Indonesia and No.2 seed Lee Chong Wei also lost to Indonesia's Santoso Simon.
Sony Dwi Kuncoro became the third Indonesian to make the semifinals after a win over Wang Choong Hann of Malaysia. South Korea's Lee Hyun-li, who previously upset Danish No. 3 seed Peter Gade, beat Japan's Shoji Sato for a semifinal place.
Former Chinese players who represnted various countries dominated the women's singles. Hong Kong's top seed Wang Chen and No.2 seed Pi Hongyan of France advanced to the semifinals along with Yao Jie, who played for the Netherlands, and Yip Pui-yin of Hong Kong.
More than 300 players from 24 countries are competing in the Taipei Open, which has a purse of US$170,000. The competition is taking place in Xinzhuang, Taipei County from Sept. 18-23.