{{Infoboks virksomhed|Logo=|Type=Privat|area_served=}} '''ONE Championship''' (tidligere kendt som '''ONE Fighting Championship''' eller '''ONE FC''' ) er en [[Singapore]]baseret MMA, [[Thaiboksning|Muay Thai]], [[kickboxing]], [[boksning]] og grappling- organisation, som blev lanceret den 14. juli 2011 af iværksætter Chatri Sityodtong og tidligere ESPN Sportsdirektør Victor Cui. <ref>{{Cite web|url=http://www.sherdog.com/news/pressreleases/ONE-Fighting-Championship-unveils-CHAMPION-versus-CHAMPION-34230|title=ONE Fighting Championship™ unveils CHAMPION versus CHAMPION|publisher=sherdog.com|access-date=2011-08-18}}</ref> ONE Championship udsender til over 1,7 milliarder potentielle seere i 136 lande. <ref>{{Cite web|url=https://www.nielsen.com/apac/en/press-room/2018/nielsen-and-one-championship-to-launch-world-sports-business-conference-in-singapore.html|title=Nielsen and ONE Championship to Launch World Sports Business Conference in Singapore|website=www.nielsen.com|access-date=2018-11-21|archive-date=21. november 2018|archive-url=https://web.archive.org/web/20181121210937/https://www.nielsen.com/apac/en/press-room/2018/nielsen-and-one-championship-to-launch-world-sports-business-conference-in-singapore.html|url-status=dead}}</ref> One Championship er støttet af Sequoia Capital, GIC, Temasek Holdings, Iconiq Capital, Mission Holdings og Greenoaks Capital.
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