The Octagon Inside the Sphere: Bloody Fights and Soaring Films

After an animated vignette of conquistadors ransacking Indigenous Mexican temples played on the Sphere’s enormous video screen and the venue’s haptic seats shook violently, two mixed martial arts fighters approached each other on Mexican Independence Day weekend. As they battled in the Ultimate Fighting Championship’s caged octagon, birds soared across a backdrop of temple ruins.

The Sphere — a futuristic orb-like structure with more than 700,000 square feet of programmable screens inside and out — has primarily hosted musicians, keynote speakers and filmmakers since opening its radiant gaze upon the Las Vegas Strip in July 2023.

It was one of those concerts last year, part of U2’s nearly six-month residency, that amazed and inspired Dana White, the U.F.C.’s chief executive. For months he has grandiosely proclaimed that he would hold the first live athletic competition at the Sphere, which can typically seat about 17,000 people.

The company invested $20 million into Saturday night’s spectacle, called Noche U.F.C., as White challenged his staff to mesh a brutal, polarizing blood sport with pageantry and flair by working with award-winning Hollywood creators.

“We showed everybody tonight what’s possible,” White said after the fight, which he said broke U.F.C. records for ticket and merchandise sales. “You can do more than just concerts here and pull them off and make them great. So who’s next?”