Thai star Boonsak Ponsana crashed out in the third round of the SCG Thailand Open badminton championships at CU Sports Complex yesterday.
The 30-year-old was defeated 21-18, 21-19 by Shih Kuei Chun of Taiwan in the men's singles.
It was sweet revenge for the world No.129 after losing to Boonsak in the Asian Championships in April.
The fifth seeded Thai, who won the title in 2004, was eliminated in the round of 16 for the second year in a row.
Chun will now face a formidable opponent in Olympic champion and top seed Lin Dan from China in the quarter-finals.
Dan, the four-time world champion, edged past Thailand's Suppanyu Avihingsanon 21-11, 19-21, 21-10 in the third round.
Boonsak and Suppanyu's defeats ended Thailand's interest in the men's singles but three Thais reached the last eight in the women's singles with their second-round wins yesterday.
Second seeded Ratchanok Inthanon defeated Xue Yao of China 2-0, third seed Porntip Buranaprasertsuk beat Lydia Li Ya Cheah of Malaysia 2-0 and Sapsiree Taerattanachai rallied to beat Kaori Imabeppu of Japan 2-1.
World No.11 Ratchanok will take on Minatsu Mitani, the seventh seed from Japan, for a place in the semi-finals, while eighth seed Sapsiri will meet top seeded Saina Nehwal after the Indian world No.5 saw off China's Li Han.
Porntip will play unseeded Nozomi Okuhara after the Japanese star beat Thailand's Salakjit Ponsana.
Busanan Ongbumrungpan, the 2012 Malaysian Open champion, also departed after losing to qualifier Sun Yu of China.
In the mixed doubles, local hopes and second seeded Sudket Prapakamol and Saralee Thoungthongkam finished off Adi Pratama and Nadya Melati of Indonesia.
In the quarter-finals, the Thais will meet Taiwan's Po Jui Huang and Chia Wen Lai.
Top seeds Joachim Fischer Nielsen and Christinna Pedersen of Denmark also booked their place in the quater-finals where they will face Jian Guo Ong and Yin Loo Lim of Malaysia.
In the men's doubles, Thailand's second seeds Maneepong Jongjit and Bodin Issara retired against South Korea's Ji Wook Kong and Sang Joon Lee.
The tournament ends on Sunday.