"ONE: Pinnacle Series 17" features back-to-back second-knockout Thongpong and British Muay Thai champion Thongphong PK-Seonchai of Thailand in a final match at "ONE: Peak" on 9 December

"ONE: Pinnacle Series 17" features back-to-back second-knockout Tumphon vs. British Muay Thai Champion

Thailand's Thongphon-PK-Shanchai will make his 120-pound Muay Thai debut at "ONE: PINNACLE SERIES 17" on 9 December, AND HE'S PUT ON A STANDOUT SHOW WITH THREE CONSECUTIVE KNOCKOUTS AT "ONE FRIDAY FIGHT NIGHT SERIES." His opponent is Great Britain's Barbosa, a 23-year-old newcomer to ONE Championship who has held the British Muay Thai Title and the WBC European Muay Thai Champion. The match will be played at the Lumpinee Arena and it will be a fierce battle with unpredictable outcome and outcome.