Jai Opetaia stopped David Nyika with a vicious knockout on Wednesday, retaining the IBF cruiserweight title on home soil in Australia.

Opetaia stopped the New Zealander in round four, landing a series of shots with Nyika stuck against the ropes and putting the challenger down and out with a brutal left hook.

Moments earlier, Opetaia had floored Nyika with a left and right at close range, but the latter was quick to stand. With a minute left in the round, however, there was always danger for Nyika, and Opetaia stalked him in pursuit of a finish.

It soon came, with Opetaia’s left hook putting Nyika facedown on the canvas and in need of treatment. A few minutes later, Nyika was sitting up, as Opetaia applauded from his corner.