Home fighter Kittiphop Mueangprom booked his place in the last 16 of the men's elite A 63.5 kilograms event on day two of the International Federation of Muaythai Amateur World Championships in Bangkok.
Mueangprom beat Sweden's Mathias Jonsson 30-27 at the Sports Authority of Thailand venue, setting up a clash with Turkmenistan's Adilbek Nurmetov who defeated Italy's Cristian Serafini by the same scoreline.
Thailand's one other senior winner today was Suthat Bunchit, who had a walkover victory against Algeria's Atallah Athmane Oussama in the men's elite A 81kg category.
There were home losses, however, for Prawit Chilnak and Siriphon Khongkaewkhluean.
Both lost 29-28 with Chilnak falling to Sweden's Kim Falk in the men's elite A 60kg and Khongkaewkhluean to Morocco's Soufiane Marzaq in the men's elite A 75kg.
Preliminary bouts are due to be held through to Thursday (July 25).
The quarter-finals are scheduled for Friday (July 26) before the semi-finals on Saturday (July 27) and finals on Sunday (July 28).
A full list of results can be viewed by clicking here.