ONE Championship’s history-making women’s atomweight champion , Stamp Fairtex , is set to face interim champ Denice Zamboanga for a title unification bout. The atomweight (115 pounds) championship fight takes place at ONE 173 on Friday, Aug. 1, at Ball Arena in Denver (presale tickets available here ). ONE Championship officials communicated the news to MMA Junkie. Thailand’s Stamp (11-2), the first three-sport champion in ONE history, has been sidelined since winning the vacant title by defeating Seo Hee Ham at ONE Fight Night 14 in September 2023