Jai Opetaia brutally knocks out David Nyika to retain IBF and The Ring cruiserweight world titles

Jai Opetaia has retained his IBF and The Ring cruiserweight world titles, knocking out David Nyika in the fourth round.

Opetaia knocked the challenger Nyika down with a brutal uppercut then, moments later, backed it up with three thunderous shots with his challenger on the ropes to end the fight.