
The third seed Khosit needed 45 minutes to beat Yu Igarashi of Japan 21-19 21-15, avenging his loss to the Japanese in Osaka Challenger in April.
“I was well prepared coming to the match as I knew he moved well. I took better control at the net and made better shot selection to make him play my game. I was the more aggressive player which is why it was a comfortable win for me,” added the 23-year-old world No 40. Indonesian Shesar Hiren Rhustavito is up next for the Thai.
“As the shuttle cock here is quite fast, I need to take the initiative to keep him out of control,” the Thai no 2 said.
Thai No 3 Suppanyu Avihingsanon, seeded 10th, spent 13 minutes less to join Khosit by beating Lai Yu-Hua of Taiwan 21-13 21-17 to set an all Thai showdown with Sitthikom Thammasin, who stunned his second straight seeded victim Panij Ahmad Maulana of Indonesia, the 16th seed, 22-20 21-13.
In the women’s doubles, Chayanit Chaladchalam and Phataimas Muenwong, the fifth seed, beat Wen Hao Yun and Ye Jing Ya of Taiwan 21-16 21-15 to reach the quarter-finals.