A championship doubleheader will headline one of the most historic UFC events of all-time on September 14, as Riyadh Season Noche UFC takes over Sphere in Las Vegas. In the main event, the UFC bantamweight title is on the line when bantamweight champion "Suga" Sean O'Malley defends his belt against "The Machine," relentless contender Merab Dvalishvili. Plus, flyweight superstars will settle the score in their third meeting as Alexa Grasso will risk her 125-pound championship against longtime rival Valentina Shevchenko.