The biggest Muay Thai competition in the world is the US Muay Thai Open. Held annually in Las Vegas, Nevada, it is one of the most prestigious events on the worldwide Muay Thai calendar. The event has been running since 1990 and attracts some of the best fighters in the world.

he biggest Muay Thai competition in the world is the annual us muay thai open. Held in Las Vegas, Nevada, it has been running since 2005 and is one of the premier events on the Muay Thai calendar. Held over ten days in late December or early January, it attracts some of the top talent in the sport and features a host of fights across all weight divisions.