Tyson Fury and Oleksandr Usyk will fight in Saudi Arabia for the undisputed heavyweight championship of the world at a date to be decided, organisers said on Friday after contracts were signed.
Britain's Fury is the WBC world champion while Ukrainian Usyk holds the WBA, WBO, IBF and IBO belts. Both men have unbeaten records.
A long-awaited blockbuster unification fight between the two has failed to get over the line in the past, with a previous attempt to meet at London's Wembley Stadium breaking down amid recriminations on both sides.
Now, with the backing and financial muscle of Saudi Arabia, it appears to be on.
Organisers said it would be promoted by Queensbury Promotions, Bob Arum's Top Rank, K2 and Usyk17 at Riyadh's Kingdom Arena.
"You can't run rabbit run anymore Usyk, you're getting it," Fury, 35, wrote on Instagram.
Heavyweight boxing's last undisputed champion was Britain's Lennox Lewis in 1999, before the current four-belt era.
"This is the fight that everyone has wanted to see for some time and now it is finally happening," said Turki Alalshikh, chairman of Saudi Arabia's General Entertainment Authority, in a statement.
