Eddie Hearn revealed how “very worried” he became for David Nyika when the cruiserweight remained motionless after being knocked out by Jai Opetaia.

World champion Jai Opetaia defends his IBF cruiserweight title with a brutal fourth-round knockout win over David Nyika in Australia.

Jai Opetaia retained his IBF cruiserweight title Wednesday with a spectacular fourth-round KO of David Nyika in Gold Coast, Australia. Opetaia, ESPN's No. 1 cruiserweight, and Nyika engaged in a firefight from the opening bell that featured nonstop exchanges of power punches.

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.

Jai Opetaia is on a hot streak, and David Nyika is the latest challenger to fall to the Australian’s heavy hands. At a boxing event in Gold Coast, Australia, on Tuesday, Opetaia successfully defended his IBF cruiserweight title with a brutal fourth-round knockout of the previously undefeated David Nyika.

Jai Opetaia (27-0, 21 KOs) remains a cruiserweight world champion after blasting out David Nyika (10-1, 9 KOs) in four rounds. The time of stoppage was 2:17.

Jai Opetaia proved to be too much for a game David Nyika in a short but sweet action fight, ultimately retaining his IBF cruiserweight title in a DAZN main event from Gold Coast, Australia. It was clear from the opening bell that neither man planned or expected a full 12 round fight,