ABU DHABI: The fifth IMMAF Youth World Championships began on Tuesday at the Mubadala Arena in Abu Dhabi with the UAE National Team securing two gold and two bronze medals. The five-day event, organized by the International Mixed Martial Arts Federation and hosted by the UAE Jiu-Jitsu and Mixed Martial Arts Federation, will run until Aug. 10, featuring over 800 athletes from more than 45 countries.