Tyson Fury's potential heavyweight unification bout with Oleksandr Usyk could be in doubt after the Gypsy King turned down a 60-40 purse split, according to the Ukrainian's promoter Alex Krassyuk.
The duo's teams are in discussions for an undisputed clash, and negotiations seemed to be nearing a conclusion earlier this week.
Fury's promoter Frank Warren revealed both camps were looking to set a date and venue for the bout, while Usyk himself said both men "need this fight".
But Krassyuk has now claimed Fury's camp have turned down an increased offer for a 60-40 split favouring the fight's winner, having also reportedly pushed against an even 50-50 purse.
"Frank Warren said he's got a pot and he needs to get the agreement of both parties to participate," Krassyuk told talkSPORT.
"If the money in the pot is not enough, it won't happen. I completely agree with it. On our side, I have nothing more to add.
"We have said that we want this fight to happen as much as possible, and we are in the position to share whatever the fight generates.
"But boxing is a sport of two men and if only Usyk gets into the ring, there won't be a match for undisputed. It will be shadowboxing of the unified champion.
"We initially agreed for 50-50. But then Tyson was asking for some bigger money. We made it clear that we are ready to go 60-40, but the winner takes 60.
"That was our latest offer [but Fury turned it down], exactly."
Warren previously indicated there would be no negotiations beyond the end of this week, with both parties reportedly eyeing up an April 29 bout at Wembley Stadium.
"We're still none the wiser, we're still waiting for it to be done," Warren said. "It's all coming to a head now, but it's still not done.
"You need the agreement of both boxers to make it happen and at the moment we haven't got that, so that's where we're at.
"We're working hard to make it happen. But I would say it's not going to go past the end of this week because the proposed date is April 29."
Ngamba makes Olympics history as IOC refugee team set for first medal
Cindy Ngamba etched her name in history after guaranteeing a first medal for the Refugee Olympic Team in Paris.
The Britain-based boxer overcame French hope Davina Michel by a unanimous points decision to reach the 75kg semi-finals on Sunday.
With no third-place bouts at the Games, Ngamba is set for at least a bronze medal even if she loses to Panama's Atheyna Bylon on Thursday.
Having led the Refugee Team as the flagbearer at the opening ceremony just over a week ago, Ngamba secured another piece of history here – though the Cameroon-born fighter is intent on not finishing just yet.
"It means the world to me, to be the first ever refugee to win a medal," Ngamba said.
"I'm just a human, just like any other refugee, athlete and refugee all around the world. But I hope I can change the medal in my next fight.
"I was fighting a very tough opponent today. A lot of people were not cheering for me. But I listened to my team, I listened to my coaches and I listened to myself.
"I stuck to the tactics and I stayed calm and composed. I'm happy that I got the job done. Hopefully, in the next one, I will also get the job done. No, not hopefully. I will get it done."
Ngamba became the first refugee athlete to make the Olympics boxing tournament in May, and the first in any sport to earn a place in the Games by qualification rather than selection.
The 25-year-old was born in Cameroon but moved to England in 2009, though is unable to return to her homeland because she is homosexual, which remains a criminal offence in the country.
Team GB have supported her citizenship application but to no avail, leading Ngamba to represent the International Olympic Committee's refugee team in the French capital.
Usyk sends Fury warning as he dismisses 'too easy' comments
Oleksandr Usyk issued a warning to Tyson Fury, urging him not to be "afraid" ahead of their highly anticipated rematch in December.
Usyk became the first undisputed heavyweight since Lennox Lewis in May following his split-decision win over Fury, ending the Gypsy King's unbeaten record.
Fury insisted that while he thought he won the fight, the only reason Usyk had been able to deliver a late onslaught was that he was "enjoying it too much and messing around".
"Oh my god, no way! Okay, no problem. The next fight will be easy [for him too]," Usyk told Sky Sports in response to Fury's comments.
"For me, my fight will be hard because Tyson Fury is a big man, a good boxer, with a good boxing IQ.
"But if Tyson says for him it will be easy, ok, no problem. I see for Tyson Fury, I see for the eyes of Tyson Fury, it's not easy. It will be hard, very, very hard.
"Tyson, don't be afraid - I will not leave you alone."
Fury had started the contest in the ascendency, landing an uppercut to the chin of Usyk which staggered the Ukrainian in the sixth round.
However, Usyk showed his powers of recovery once again, unloading on Fury with a flurry of punches that forced a knockdown in round nine.
Referee Mark Nelson stepped in to give Fury a count as he stumbled across the ring with just the ropes keeping him upright, managing to survive the full 12 rounds.
"For me, it doesn't matter," Usyk said on the officiating in Saudi Arabia. "Every referee, it's a professional guy.
"The referee does his job. Maybe my last punch would be dangerous for Tyson Fury. It's good.
"Tyson has a big family, I have a big family. Listen, we win. Everything is ok. I do not think about the referee after the fight. We win, thank god, all good, everything is ok.
"A lot of people say, 'Oh the referee took your knockout win' and say 'Referee bad'. I think no, the referee is good. It's just talking. Blah blah blah."
Lewis thanks former rival Rahman for help with Lewis’ League of Champions Boxing Camp in Jamaica
Former undisputed World Heavyweight Champion Lennox Lewis has expressed gratitude to former rival Hasim Rahman for participating in Lewis’ League of Champions Boxing Camp.
Rahman was among a number of high-profile names in the boxing world who helped coach youngsters at the camp which was held from July 8-13 at the Hopewell Sports & Community Centre in Hanover.
Rahman handed Lewis the second loss of his professional career to take his heavyweight titles back on April 22, 2001 in South Africa before, on November 17 that same year, Lewis got his revenge by knocking Rahman out in the fourth round in their rematch to regain his heavyweight titles in Nevada.
“Me and Hasim have come a long way from trading blows in the ring and the power of giving back to the youth is something that can even bring old foes like us together,” Lewis said in a post on Instagram on Tuesday.
James Ali Bashir, the former coach of current undisputed heavyweight champion Oleksandr Usyk, as well as former WBC Super Bantamweight Champion Alicia Ashley and former CBF Welterweight Champion Sakima Mullings were also on hand to help out the youngsters at the camp.
“Giving back to the youth has become a central mission in my life but I can’t do it alone. I’m grateful to everyone who helps make it all possible,” Lewis said.
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