David Haye and Tyson Fury look set for a heavyweight showdown in Manchester on September 28 after both boxers' camps confirmed the deal in a joint press release.
Haye and Fury will officially confirm details of the fight at a press conference scheduled for London on Thursday.
The announcement comes one day after Haye posted a video on social media sites purporting to show him signing a contract for the hotly-anticipated contest.
Fury did not comment on Haye's claims but the fact his promoters Hennessy Sports added their name to the press release suggests the fight is now a done deal.
The joint statement read: "David Haye and Tyson Fury, both world-ranked, charismatic and dangerous, have agreed to a highly-anticipated domestic showdown on Saturday September 28 at the Manchester Arena.
"It marks not only the biggest heavyweight encounter of 2013, but also the biggest fight staged in Britain for many years."
Haye bounced back from his world title defeat to Wladimir Klitschko in 2011 with a fifth-round stoppage win over another domestic rival, Dereck Chisora, in London last July.
Fury has won all 21 of his professional contests to date, most recently a seventh-round stoppage of American Steve Cunningham in April.