Tyson Fury’s promoter says an existing relationship between Eddie Hearn and Daniel Kinahan saw agreement reached for two fights with Anthony Joshua.
The heavyweight champions are set to meet for the first time in the summer of 2021.
Frank Warren confirmed that negotiations took place between Kinahan and Hearn to get the deal done.
In confirming the deal on Instagram, Fury singled Kinahan out for thanks in making the deal.
"I’m just after getting off the phone with Daniel Kinahan. He’s just informed me that the biggest fight in British boxing history has just been agreed," the WBC heavyweight champion told his 3.7million Instagram followers.
"Big shout out to Dan. He got this done, literally over the line," he continued, "Two fight deal. Tyson Fury versus Anthony Joshua next year.
"One problem I just got to smash Deontay Wilder’s face right in in next fight and then we’ll go into the Joshua fight next year.
“So there we are the Gypsy King versus AJ is on for next year.
"But there’s a hurdle in the road called The Bronze Bomber AKA the knockout king. But I will get on to him and knock him spark out and then we’ll go on for the big fight.
"So a big thank you to Dan for getting this deal over the line. All the best. God bless you all. See you soon."
The first of the two fights is likely to take place in the Middle East in the summer of 2021.
Frank Warren / Queensberry statement:
Queensberry Promotions and MTK Global have have seen today's commentary in relation to a potential unification fight between Tyson Fury and Anthony Joshua.
We can confirm negotiations have taken place between Eddie Hearn and Tyson's adviser Daniel Kinahan.
Both Queensberry and Top Rank, as Tyson's exclusive promoters, and MTK Global, his management team, agreed that this would be the best way forward due to the existing relationship between Eddie and Daniel.
As with all previous statements, Queensberry, Top Rank and MTK are committed to working with all parties to get this fight over the line.
At this point, we can confirm no contracts have been signed between any of the concerned parties, nor have any specifics been agreed regarding venues, dates and numerous other key terms.
Both sides do accept that any prospective fight will demand a 50/50 split and both sides accept there will be a rematch.
Obviously, we are keen to make the fight that British fans demand and will continue negotiations in order to deliver Tyson his shot at becoming the Undisputed Heavyweight Champion of the World.
Things are going in the right direction and we couldn't be more happy that a potential mega fight is in reach.