The long-awaited and highly anticipated Muay Thai showdown fans have been asking for will happen on Friday, September 22. ONE Flyweight Muay Thai World Champion Rodtang Jitmuangnon will collide with top contender and ONE Flyweight Kickboxing World Champion Superlek Kiatmoo9. ONE Championship Chairman and CEO Chatri Sityodtong revealed the bout on Facebook on Sunday.