Fury and Wilder drew in December 2018 before the Brit landed a win in February 2020
The trilogy fight between Tyson Fury and Deontay Wilder in Las Vegas on July 24th was postponed after the Briton tested positive for coronavirus.
A source close to Fury told BBC Sport that the WBC heavyweight champion was deeply frustrated with the situation.
Fury tested positive on Thursday and after talking to medical experts, the fight was called off – it’s likely to be postponed to October.
Wilder’s manager Shelly Finkel said: “Deontay is disappointed.”
An official announcement from the organizer Top Rank is expected later on Friday.
Fury defeated Wilder to become WBC champions in February 2020 – 14 months after the couple shared an exciting draw in Los Angeles.
Neither of the two has fought since Fury’s win in Las Vegas.
After a third fight failed several times due to complications related to the Covid-19 pandemic, Fury tried to move on and face Brit Anthony Joshua, who holds the other three major heavyweight titles.
But an arbitration hearing ruled that Wilder had contractual grounds for a third competition.
Fury is unbeaten in his 31 fights, while Wilder has only suffered one defeat in 44 appearances.
BBC boxing correspondent Mike Costello said the delay “also jeopardizes the chances of Fury taking on Anthony Joshua in a unification showdown later this year”.
He added: “Joshua’s team has been negotiating with Ukrainian Oleksandr Usyk about a possible competition in September.”