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UFC 306 takes place at the Sphere in Las Vegas on Saturday night .
The main card is on ESPN+ pay-per-view at 10 p.m. ET , with prelims on ESPNews and ESPN+ at 7:30p . ET.
The event also features a women's flyweight title bout between champion Alexa Grasso and former champ Valentina Shevchenko .
UFC 306 will be the first live sporting event at the revolutionary Sphere in Las Vegas with UFC 306 .
UFC bantamweight champion Sean O'Malley will defend his title against Merab Dvalishvili .
The event is sponsored by an arm of the government of Saudi Arabia and the Saudi Arabian government.
UFC 306 is the first pay-per-view event from Dana White that isn't simply billed as UFC followed by a number.
"Noche UFC" is UFC 's first sporting event at the Sphere, the $2.3 billion venue that opened last year .
The co-main event pits women's flyweight champion Alexa Grasso against former titlist Valentina Shevchenko .
The event will also premiere the film " For Mexico , For All Time," told in six 90-second chapters between fights and displayed inside the Sphere .