Watch Online Free on Watchseries. UFC 315: Muhammad vs. Della Maddalena was a mixed martial arts event produced by the Ultimate Fighting Championship that took place on May 10, 2025, at the Bell Centre in Montreal, Quebec, Canada. A UFC Welterweight Championship bout between current champion Belal Muhammad and Jack Della Maddalena headlined this event. A UFC Women's Flyweight Championship bout between current two-time champion Valentina Shevchenko and Manon Fiorot took place in the co-main event.