Khabib Nurmagomedov vs Conor McGregor

The most commercially significant fight in MMA history. An undefeated Dagestani wrestler defending the lightweight title against the sport's biggest star, wrapped in a genuinely bitter rivalry that had spilled outside the cage months earlier.

Khabib submitted McGregor in round four, then left the octagon and set off a chaotic post-fight melee. Both men were later suspended and fined. The event sold a company-record pay-per-view number.

Marked the peak of MMA's mainstream crossover and confirmed Dagestani wrestling as the dominant system at 155 lbs.

Judges: Sal D'Amato, Derek Cleary, Chris Lee