http://www.iht.com/articles/ap/2006/09/22/sports/EU_SPT_BAD_Worlds.php MADRID, Friday Eighth-seeded Bao Chunlai upset top-seeded Lee Chong Wei of Malaysia 22-20, 12-21, 21-18 to advance to the semifinals of the badminton World Championships on Friday. Lee felt cheated by two controversial line calls at 17-17 and 19-17 in the decider that went against him. The second gave Bao a match-point and although Lee saved it, the relief was only temporary. "I don't want to fight about it now but the shuttle was out on two crucial points," Lee said. "I don't think the decisions were fair. It was 50-50 out there and I could have won — but Bao played well." Bao's win means three of China's four players are through to the semifinals after defending champion Taufik Hidayat was knocked out Thursday, but Lee claimed unfair tactics were used. "The Chinese coach shouted at me during the match and threatened to break my legs, and that isn't acceptable. It was a psychological tactic to upset me," he said. Bao now plays Lee Hyun-ll after the South Korean beat third-seeded Chen Jin of China 21-14, 19-21, 21-12. "I felt very calm and I was in a very balanced mood," Bao said. "I didn't play well at the windy end, but I learned a lot from it. This was a very important match for me." Chen Hong knocked out three-times European champion and 2001 worlds runner-up Peter Gade of Denmark 21-17, 15-21, 21-12. "I still think Chen and I are among the four or five players capable of winning world titles," Gade said. "I shall try again next year and then go for the Olympic Games in Beijing in 2008." Chen will now play second-seeded teammate Lin Dan, who defeated Muh'd Hafiz Hashim 21-10, 21-9 in just 25 minutes. On the women's side, Petra Overzier scored a shock win over Jiang Yanjiao 21-18, 14-21, 21-14 and will play Olympic gold medallist Zhang Ning, who beat Tracey Hallam 20-22, 21-10, 21-10. In the other semifinal, defending champion Xie Xingfang will meet Xu Huaiwen. Xingfang beat fifth-seeded Pi Hongyan 21-17, 21-10 and Huaiwen topped Nedeltcheva 21-14, 17-21, 21-16.