Arnond Vongvanij upstaged heavy favorites Thaworn Wiratchant and Mardan Mamat with a two-stroke victory in the King's Cup on Sunday to claim his first Asian Tour title.
The 23-year-old Thai, who qualified for the Asian Tour in January, shot a final round 64 including birdies on the 16th and 17th.
Arnond finished with an overall 22-under 266 at the Singha Park Kohn Kaen Golf Club. He said "I putted well and hit well and had some luck."
Singapore's Mamat (69) and Thailand's Thaworn (68) shared second place, 1 shot behind Arnond.