UFC 306: Date, UK start time, how to watch and undercard as Sean O'Malley looks to defend his title against Merab Dvalishvili in unprecedented night at the Sphere in Las Vegas

Sean O'Malley and Merab Dvalishvili headline an unprecedented night in UFC this weekend when the promotion makes its debut at the state-of-the-art £1billion venue, the Sphere in Las Vegas.