Boxing: Joseph Parker concedes he's fighting to save his career in Derek Chisora rematch

Joseph Parker and Derek Chisora have hit the scales in their final face-to-face meeting before their heavyweight rematch on Sunday morning (NZ time). 

Parker weighed in 5kg heavier than in his first encounter with the Brit in May, while also carrying the extra weight of his future in the sport on his shoulders.

Heavier than he's ever been, more confident than he's ever been, Parker has more on the line than there's ever been before.

"[If I] lose this fight, and I don't perform well [it's] the end," Parker tells Newshub.

"I'll have to look at myself, and boxing."

The bright lights, the hype, the ongoing antics of his opposition, it's all merely background noise for the re-focussed Parker.

With months now under a new coach, and the training company of WBC world heavyweight champion Tyson Fury, Parker's camp in Morecambe has been a game-changer.

But being so far from his family at home has been hard. 

"Make it all worth it, I have to. I have to go out there and give it all I have," he adds. 

Parker wants a shot at the world title again, but promoter Eddie Hearn has warned it's going to take more than just a win to get him there.

"You need to be exciting," Hearn tells Newshub.

"This is the pivotal moment that is going to lead him either to the world title shot, or a final eliminator."

Having lost the belt to Anthony Joshua in 2018, this is a near four-year rebuild Parker can't afford to blow. 

When Chisora and Parker first met in May, the Kiwi walked away with the win only thanks to a controversial split decision. And he knows the pressure is on to deliver something far more convincing this time around. 

"If he looks good, and goes in there and blows Derek Chisora away, all of a sudden we can start singing from the rooftops saying this guy is back," adds Hearn. 

That's why, for the first time, he's called it - predicting a knockout between the sixth and tenth rounds.

"I have a feeling," Parker adds. "I've been picturing a few things, and visualising myself getting the better of him and slowing him down."

Parker's confidence is backed up by compatriot David Nyika - who will fight on the undercard in his second professional bout. 

"He's in great shape, he's big too," Nyika tells Newshub. 

"He's a few pounds heavier than Chisora, he's sharp, he's fit, he's ready to go."

For now though, Parker is ready to put on a show.

"Tomorrow is gonna come, and it's gonna be a good day." 

Join Newshub for live updates of Parker v Chisora II from 7am Sunday.