Friday night's World Series of Fighting 33 main event has been canceled.

The Justin Gaethje vs. Ozzy Dugulubgov lightweight title fight is off because Dugulubgov fell ill Friday morning, WSOF president Ray Sefo confirmed with MMAFighting.com. Sefo said Dugulubgov had a headache, low blood pressure and was headed to a local Kansas City hospital for further evaluation.

Despite not fighting, Sefo said Gaethje will be paid.

As a result, the David Branch vs. Vinny Magalhaes light-heavyweight title fight will serve as the new main event.

The main card airs live on NBCSN from the Municipal Auditorium Arena in Kansas City, Mo.