Joseph Parker's promoter claims that he has "pretty much given up" on the Anthony Joshua fight from materialising after receiving an insulting low opening offer.

The New Zealand boxer in a press conference last week challenged the undefeated Joshua, and his promotional team Duco Events even admitted that they would accept a 40-60 split in favour of Joshua.

That shows how eager they are to get the fight booked and organised.

David Higgins, a director at Duco Events, is set to end negotiations already, however, after receiving an opening email from Joshua's promoter Eddie Hearn.

"I got this weird email from Eddie's email address, but he must have been hacked," Higgins exclusively told Sky Sports.

"He made the most ridiculously low offer. It could have been the most insulting offer in boxing history.

"To expect 40 per cent is actually quite reasonable, because you have earned it, and it's a unification.

"Of course I have mentioned it [to Joseph Parker] and he just laughed like I did.

"I'm not going to reply, because I don't think it was Eddie Hearn. I reckon someone hacked his account, it was a scam. I reckon Eddie respects boxing and I reckon Anthony Joshua wouldn't want to insult Joseph Parker.

"Joseph has worked his way from the ground up and earned the right. Joshua, I think, would understand and respect that, so it can't possibly be AJ or Eddie that made the offer. It must be an email hack."

Hearn has also been holding negotiations in America regarding a potential unification with WBC champion Deontay Wilder, while the boxing promoter is also holding out for a trans-Tasman fight with Lucas Browne, or even a possible event in China.

"We will come to England and fight AJ, but 40 per cent is the bottom line and I can give my word now, not one per cent less.

"We have got several fights on the table and I tell you this, we have pretty much given up on Joshua. Assuming someone hacked his email, I apologise to Eddie, and he's welcome to give me a call. He's got my number if he wants to actually make a respectable offer.

"Joseph has earned the right. He's going to put it all on the line and deserves a fair payday. The terms they offered disrespect every kid in the world who wants to become heavyweight world champion and set their family up for life."