UFC 331 took place Saturday, September 19th, 2026, in Los Angeles at the Crypto.com Arena. This event marked the first return of the flyweight class since 2018, and also included a rematch for Joshua Van and Alexandre Pantoja. The event featured a major lightweight matchup between Arman Tsarukyan and Mauricio Ruffy, plus appearances from notable figures in sports and internet culture. Joshua Van vs. Alexandre Pantoja Part Two Joshua Van defended the UFC flyweight championship