Frank Warren told talkSPORT: "We're still none the wiser.

"You need the agreement of both boxers to make it happen and at the moment we haven't got that."

Warren admits the purse split is a major sticking point over the first undisputed title fight in over a quarter of a century.

He said: “I have a pot and out of that pot I can only pay what’s in it.

"And if it’s not enough money the fight won’t happen, at the end of the day we’re running a business."

But he insists he's doing everything in his power to get the fight over the line, adding: “We’re working hard to make it happen.

“And, with the greatest respect, I didn’t ring talkSPORT to do an interview about it, you rang me.

“So, out of courtesy I’m telling you where we are, but I’m not going to be conducting negotiations at the moment they’re confidential between the two parties.

“But, I would say it’s not going to go past the end of this week that’s for sure because the proposed date is April 29."

He continued: "No one wants to see this fight more than me, no one has ever promoted the four belts, it’s never happened.

"So it’s history-making.

"I want it, but I can’t force people into a situation unless they’re comfortable.”

https://www.thesun.co.uk/sport/21623...-fight-update/