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.

It was a vicious knockout, as brutal as it gets, as Opetaia landed a right, then two staggering lefts as the challenger dangled precariously.

Nyika was down for several, scary minutes as medical staff rushed to ringside and the Gold Coast held its breath.

Nyika gradually got to his feet before being helped back to his dressing room by his team, having suffered his first career defeat.

Opetaia, although hurt in the third round by a game and enthusiastic Nyika, looks almost unstoppable.

The 29-year-old instantly called out WBO and WBA champion Gilberto Ramírez to unify the division.

In the co-main event, Justis Huni won his 12th-straight fight with a second round KO victory over Shaun Potgieter to retain his IBF Pan-Pacific and WBO Global heavyweight titles.

On the undercard, Australia's Paris Olympian Teremoana Teremoana earned a spectacular knockout victory, battering Osasu Otobo to the deck inside a minute in their heavyweight contest.

Teremoana planted a powerful shot on the top of Otobo's head and the big German could not beat the count.

The heavyweight prospect has plenty of people interested in his future prospects, not least Eddie Hearn who said it was "time to get excited" about the 26-year-old, praising him as a future world champion.

There was also a win for Australian Ben Mahoney against Fan Zhang, who claimed a shut out to win the IBF Pan-Pacific super welterweight title by unanimous decision, a match punctuated by a brief power outage caused by a lightning strike.

Brisbane prospect Max McIntyre then knocked out Abdulselam Saman to win the IBF youth super middleweight title.

- First pubished on ABC