Defending local champion Boonsak Polsana booked his place Wednesday in the second round on the opening day of the 80,000-dollar Thailand Open badminton tournament. The eighth seed, who became the tournament's second Thai champion with his victory last year, took 30 minutes to overcome Keishi Kawanguchi of Japan, 15-10, 15-7. Boonsak, who last year reached the semi-finals of the Olympic men's singles, will meet another Japanese, Shinya Ohtsuka, in the second round. Ohtsuka beat Vietnamese qualifier Hoang Hai Nguyen, 15-4, 15-1.
World number four and the tournament's first seed, Kenneth Jonassen of Denmark, won his opening match against Thai qualifier, Jaturong Butrbhodi, 15-10, 15-2
Second seed Xia Xuanze of China took only half an hour to defeat Filipino Kennevic Asuncion, 15-4, 15-7, while China's Yi Lu saw off a strong challenge from Taiwan's Feng Chin Chang to win 15-11, 13-15, 17-14.
Marc Zwiebler from Germany was the tournament's only seeded player to lose in the first round. He was surprisingly outgunned by Jung Woon Hwang of South Korea in three sets, 15-2, 5-15, 15-9.
Second round matches start late Wednesday.
COLLATED RESULTS: Men's singles (1st round): Kenneth Jonassen (DEN x1) bt Jaturong Butrbhodi (THA) 15-10, 15-2; Yan Kit Chan (HKG) bt Erwin Djohan (SIN) 6-15, 15-4,15-8; Andres Boesen (DEN x10) bt Kay Bin Yeoh (MAS) 15-6, 15-6; Jin Chen (CHA) bt Mohd Hazwan Jamaluddin (MAS) 15-3,15-0; Wei Ng (HKG x5) bt Sarin Tongpradit (THA) 15-3, 15-6; Eric Go (USA) bt Clemens Smola (AUT) 15-1, 15-3; Jung Woon Hwang (KOR) bt Marc Zwiebler (GER x16) 15-2, 5-15, 15-9; Saman Ismail (MAS) bt Tanongsak Saensomboonsuk (THA) 15-6, 15-8; Dicky Palyama (NED x4) bt Aamir Ghaffar (ENG) 15-9, 15-5; Jeffer Rosobin (INA) bt Geoffrey R Bellingham (NZL) 15-9, 15-13; M. Roslin Hashim (MAS x9) bt Jenrop Jenjitranont (THA) 15-3, 15-0; Yi Lu (CHN) bt Feng-Chin Chang (TPE) 15-11, 13-15, 17-14; Boonsak Ponsana (THA x8) bt Keishi Kawaguchi (JPN) 15-10, 15-7; Shinya Ohtsuka (JPN) bt Hoang Hai Nguyen (VIE) 15-4, 15-1; Yen Hui Kendrick Lee (SIN) bt Chin Lun Liy (TPE) 15-2, 15-10; Panuwat Pisantanakul (THA) bt Tawan Huansuriya (THA) 17-14, 15-3; Kasper Oedum (DEN) bt Robert Kwee (NED) 15-13. 15-4; Agus Hariyanto (HKG x14) bt Stuart Brehaut (AUS) 15-1, 15-8; Poompat Sapkulchananart (THA) bt Nattanan Pulpitak (THA) 15-0, 15-3; Bjoern Joppien (GER x6) bt Jakrapong Thanatirarham (THA) 15-3, 15-4; Quang Minh Nguyen (VIE) bt Nicholas Kidd (ENG) 17-15, 15-7; Sairul Amar Ayob (MAS) bt Cheol Ho Lee (KOR) 8-15, 15-1, 15-1; Mahardi Wiempie (INA) bt Yogendran Khrishnan (MAS) 15-10, 15-13; Ronald Susilo (SIN) bt Yuk Wong Hung (HKG) 15-9, 15-3; Salim Sameon (MAS) bt Peerasak Wiriyapadungpong (THA) 15-8, 15-1; Niels Christian Kaldau (DEN x7) bt Abhinn Shyam Gupta (IND) 15-3, 15-8; Chen Yen Lee (TPE) bt Mohd Nazree Latifi (MAS) 15-11, 15-13; Beng Hong Kuan (MAS) bt Sittichai Viboonsin (THA) 15-3, 15-6; Tsuen Seng Lee (MAS) bt Vasin Nilyoke (THA) 15-6, 15-11 Xuanze Xia (CHN x2) bt Kennevic Asuncion (PHI) 15-4, 15-7.