George Kambosos Jr. admits he did not have his usual urgency during his lopsided loss to Devin Haney.

The Aussie native suffered a comprehensive points defeat to Oakland, California’s Haney in their undisputed lightweight championship in June at Marvel Stadium in Melbourne, Australia.

In order for Haney (28-0, 15 KOs), who had the WBC belt, to fight Kambosos (20-1, 10 KOs), who had held the WBC, WBO, and IBF titles, Haney needed to agree to an immediate rematch in Australia in the even that he won. Their rematch was officially announced yesterday: October 15 at Rod Laver Stadium in Melbourne (Sunday afternoon, Oct. 16 local time). Haney won a unanimous decision in the first fight.

But the rematch clause apparently had a pacifying effect on Kambosos, who recently confessed that he did not have the same level of desperation in the Haney fight as he did in his previous fights, such as his upset over Teofimo Lopez last year at Madison Square Garden’s Hulu Theater in New York City to win three of the four 135-pound belts.   

Kambosos, 29, insisted that he will adopt a “do or die” attitude in the rematch with Haney, 23. The Aussie even suggested that he may consider retirement if he fails to come out on top.

“It’s been like that (having an urgent mindset) for my whole career,” Kambosos said during a news conference. “For the (Teofimo) Lopez fight, for the (Lee) Selby fight, even against (Mickey) Bey back in the day. It’s always been like that.

“The only time that changed was the first fight with Haney, where in the back of your mind you do have that rematch clause. It wasn’t do or die. That’s not when I’m at my best. So, do or die for me it is (for the rematch). It could be the last time you ever. Or I get all the belts back.”