Anthony Joshua says he has "no respect" for Joseph Parker's attempts to "demonise" his reputation in order to secure a heavyweight unification bout.
During a news conference last month, WBO world champion Parker offered money for footage of the Briton being knocked down during sparring.
Joshua said the 25-year-old was "trying to mislead the public's opinion".
"I think it's not nice, I don't really respect it and I have no time for it," said the IBF and WBA champion, 28.
"What's he trying? Be the big bully? Demonise everything I have done?"
Speaking to BBC Sport he added: "In Formula 1, golf, tennis, rugby, they are very classy people, respectable amongst their peers.
"Then you have people like Joseph Parker holding a press conference talking about everything he thinks I am."
Parker's news conference, which featured a video showcasing Joshua being knocked down as both a professional and amateur, was a response to what the New Zealander's team perceived to be a poor financial offer for a potential fight.
Promoter David Higgins said his fighter would not take anything less than a 35 per cent split of revenue if the bout is to be made.
Should the fight happen, the winner could then face WBC title holder Deontay Wilder in a bout which could unify all four major titles in the heavyweight division.
Joshua beat Wladimir Klitschko to claim the WBA title in April, and followed that success with victory over Carlos Takam on October 28, 2017.
"This is the first time in my career where the talk has been about money," added Joshua. "That's what's holding it up.
"With Klitschko it wasn't about the money, it was about getting the fight together for the belts. With Parker it's a different story, and Wilder.
"No disrespect for them, they have their reasons, but I feel like the fans are not getting what they want.
"It would have been great to have it pencilled in now but it will happen in the future once they come to their senses.
"What they are offering is nothing, and what we are offering is 10 times better than what they can bring up themselves."
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Caption:
Anthony Joshua (right) stops Carlos Takam by TKO in the 10th round during his last bout in October this year.
Tony Bellew's rematch with David Haye has been rescheduled at The O2 on May 5, live on Sky Sports Box Office.
It will be recalled that WBC cruiserweight world champion and fellow Briton Bellew, 34, stopped former heavyweight world champion Haye, 37, in the 11th round in March this year.
The British rivals were forced to put back their planned second fight this month after Haye suffered a bicep injury during training on November 16 that he described as a "freak accident".
But Bellew remains determined to inflict another humbling defeat on Haye following his stunning stoppage victory at the same London venue in March.
"I'm pleased to get a new date in the diary and I look forward to giving boxing fans a great night on May 5," said Bellew.
"To be honest I was looking forward to a great victory in December and a relaxing family break over Christmas, but my mind is still very much on this fight and I will punish him for that.
"I now have a very clear plan for 2018 and that is to knock out David Haye, and then knock out Tyson 'Stavros Flatley' Fury and end both their careers.
"But first thing's first, I need to rid the sport of David Haye on May 5 and I look forward to doing this in what I believe will be an explosive fight."
Haye was "heartbroken" to miss out on a December showdown with Bellew and admits he is fighting to keep alive his career.
"Tony has boasted that the rematch gives him the opportunity to force me into retirement," said Haye. "Unquestionably, I step into the ring on Saturday May 5, with both my career and legacy on the line.
"After my freak accident down a stairwell last month, I was heartbroken not to give everyone the ending to 2017 I wanted. Since then I had to accept the cards I had been dealt, remain positive and focus on factors which are within my control; rehabilitation and rescheduling the fight.
In 2018, 'The Hayemaker' will be back and I will once again give fans the biggest, most explosive, blockbuster fight nights they deserve.
"Over the past five years, I've had a number of challenges to overcome, but learnt often during times of adversity we learn and grow. As a result, come May 5, Tony will be faced with a more experienced and more determined opponent.
"On Saturday May 5, whether you are lucky enough to witness the showcase live, or tune in from home on Sky Sports Box Office, you will not be disappointed. I will give fans the ending I have promised.
"In 2018, 'The Hayemaker' will be back and I will once again give fans the biggest, most explosive, blockbuster fight nights they deserve."
Tickets for the original December 17 date are still valid for this event. If you require a refund, please contact your point of purchase.
Any returned tickets will be returned on general sale via www.theO2.co.uk on Thursday 14th December at midday.
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Caption:
Bellew (right) deals with Haye during their first meeting in March this year. The rematch earlier scheduled for this month has been moved to May 5, 2018.
