MMA fans have been waiting for a decade to see heavyweight royalty Fedor Emelianenko and Frank Mir square off, but it was all over in less than a minute as the Russian delivered a thunderous KO at Bellator 198.
Emelianenko ruled the sport for the better part of a decade, going undefeated from 2001 to 2009 while largely fighting in the Pride organization.
Mir was in the title picture in the UFC for much of that time, winning the belt against Antonio Rodrigo Nogueira in 2008 before losing it to Brock Lesnar.
They featured in Illinois on Sunday as part of Bellator's heavyweight tournament. The winner would proceed to a semi-final fight against Chael Sonnen.
After copping an early blow that put him down, Emelianenko made Mir pay for not respecting his power.
The American, who was knocked out by Australian Mark Hunt in his last fight in the UFC in 2016, was clipped with a left hook as he charged himself with his head down.
Mir stumbled face forward to the floor, allowing Emelianenko to pounce and follow up with several ground strikes before the referee called a stop after just 48 seconds.
The MMA universe was stunned.
It capped off a wild night for Bellator as all five main card fights ended in stops, including four in the first round.
Dillon Danis made a memorable debut, submitting Kyle Walker through hold in the second minute of their catchweight bout at 175 pounds.
Neiman Gracie continued his family's legacy by choking out Javier Torres, before Rafael Lovato Jr. arm-barred Gerald Harris and Emmanuel Sanc hez finished Sam Sicilia by arm-triangle.