Jai Opetaia peppered David Nyika with a series of hooks in the deciding round, including a devastating left to end the fight.

Opetaia, 29, proved he is one of the most dangerous boxers on the planet with a brutal fourth-round knockout of Kiwi David Nyika ... believe Jai is the only boxer who can truly challenge Oleksandr ...

Rewatch the Opetaia vs. Nyika prelims below and catch full results and highlights of Wednesday's Jai Opetaia vs. David Nyika fight card with Uncrowned. IBF cruiserweight title: Jai Opetaia def.