South Korea's top seed Lee Hyun-il has made it through to the third round at the Badminton World Federation (BWF) Thailand Masters Grand Prix Gold in Bangkok.
The 35-year-old, who won a World Championship bronze medal in 2006 in Madrid, saw off India's Shreyansh Jaiswal in round one, 21-16, 21-13.
He was then too strong for Malaysia's Zulhelmi Zulkiffli in round two, beating him 21-13, 21-16 at the Nimibutr Stadium, and will now face home favourite Kantaphon Wangcharoen in round three.
Son Wan-ho, the second seed and another South Korean, is also still in contention but he needed three games to beat China's Lin Guipu 21-15, 12-21, 21-6 in round one.
He then eased past another Chinese, Zhao Junpeng, 21-14, 21-6, to set up a meeting with Malaysia's Zulfadli Zulkiffli.
Another South Korean, Lee Dong-keun, was the biggest casualty of the early stages after the number eight seed was beaten in round one by Indonesia's Sony Dwi Kuncoro, who triumphed 16-21, 21-15, 21-17.
In the women's draw, the withdrawal of India's top seed Saina Nehwal means Thailand's Ratchanok Intanon is favourite on her home courts.
The number two seed beat Korean Lee Jang-mi 21-10, 21-12 to reach round two, while Korean third seed Sung Ji-hyun is also through after a walkover win over India's Saili Rane.
The action continues in Bangkok tomorrow.