UFC fighters commonly enter the Octagon compromised. That was very much true for some of the biggest stars competing at UFC 307. Headliners Alex Pereira and Khalil Rountree Jr, and women's bantamweight contender Kayla Harrison had health complications before Saturday's pay-per-view.

Pereira (12-2 MMA, 9-1 UFC) retained his light heavyweight title in Saturday’s UFC 307 headliner at Delta Center when he brutally finished Khalil Rountree by Round 4 TKO.

The UFC 307 main event was almost cancelled, according to broadcast commentator Daniel Cormier. UFC 307 was littered with controversy, with four dicey split decisions and some 'atrocious' refereeing.