TOKYO (AFP) Athens Olympic gold medallist Taufik Hidayat became the biggest casualty on Wednesday when he crashed in an unexpected loss to Japans Sho Sasaki in the Japan Open badminton tournament. The Indonesian fourth seed, who reached the final at the world championships last month, failed to take the last two points in the last two games before going down 18-21, 23-21, 21-19 in the mens singles first round. Eighth seed Yao Jie of the Netherlands earlier in the day became the first seed to fall, losing to Sung Ji-Hyun of South Korea 21-18, 21-15 in the womens singles, but other favourites safely went through. You say it was an unexpected defeat, but you never know whether you can win or lose. Theres always a possibility to lose any matches, said Hidayat, the 2005 world champion, now 29. World number one Lee Chong Wei of Malaysia made quick work of Gurusaidatt Raja Manuri Venkata of India 21-5, 21-9, while defending champion Bao Chunlai of China outclassed Dionysius Hayom Rumbaka of Indonesia 21-14, 21-10. Lee, the winner in Tokyo in 2007, and Bao, the 2009 champion, stayed on course for a probable quarter-final meeting in the 200,000-dollar event. Two-time Japan champion Peter Gade of Denmark, second seed, breezed past Wong Wing-ki of Hong Kong 21-13, 21-16. In the womens first round, last years finalists Wang Yihan and Wang Xin of China, as well as 2007 winner Tine Baun of Denmark and Pi Hongyan of France stayed in form. Wang Yihan, seeking to become the first player to win three straight Japan title, whipped Jeanine Cicognini of Switzerland 21-10, 21-6, while Wang Xin breezed past Pai Hsiao-ma of Taiwan 21-16, 21-14. European champion Baun defeated Salakjit Ponsana of Thailand 21-13, 21-11, and Pi downed Japans Yu Hirayama 20-22, 21-10, 21-12.