A middleweight title bout between champion Alex Pereira and former titleholder Jamahal Hill headlined the historic UFC 300 fight card on Saturday.  

Pereira left the fans inside T-Mobile Arena in Las Vegas stunned when he knocked Hill out in the opening round of his first title defense.  Seconds before the knockout, Pereira was accidentally kicked in the groin by Hill.  As referee Herb Dean attempted to check on Pereira and potentially give him time to recover, Pereira waived him off.  He then removed Hill from consciousness.  

Take a look back at the UFC 300 main event highlights.  

UFC 300: Alex Pereira vs. Jamahal Hill Highlights