Watch FMovies. UFC Fight Night 239: Tuivasa vs. Tybura was a mixed martial arts event produced by the Ultimate Fighting Championship that took place on March 16, 2024, at the UFC Apex facility, in Las Vegas, NV, United States. A heavyweight bout between Tai Tuivasa and Marcin Tybura was scheduled for UFC 298 but the bout was moved in order to headline this event.