The matchup between the two Thais was a dream battle for fans on Thursday at the Singapore Indoor Stadium.
After battling five tough rounds, Tawanchai did enough to stay ahead on the scorecards and earn a unanimous decision.
Earlier on the card, Thailand’s Ferrari Fairtex came into the limelight by beating Han Zi Hao from China.
He picked apart Han to leave the Circle with a unanimous decision in his promotional debut.
Sangmanee PK Saenchai also made a strong impression in his comeback fight. He regained his composure in the second round to win the latter stanzas against Zhang Chenglong and earn a split-decision victory.
In the two ONE Heavyweight Kickboxing World Grand Prix semi-finals, Roman Kryklia astonished with his first-round demolition of Guto Inocente, while Iraj Azizpour defeated Bruno Chaves to set up a final clash.
A shy showing from Chaves allowed Azizpour to put on a confident performance to solidify his place in the Grand Prix final against old foe Kryklia.
Rodrigo Marello had a record-breaking performance against Ruslan Bagdasarian, as he trapped the Russian with an ankle lock in just 15 seconds, making history for scoring the fastest finish in ONE submission grappling history.