Deontay Wilder will face Zhilei Zhang as part of Eddie Hearn's team to take on Frank Warren on June 1 in Riyadh.
Rival promoters Hearn and Warren have today announced the card for their '5 vs 5' team showdown, which will take place on the undercard of Artur Beterbiev and Dmitry Bivol's undisputed clash.
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Wilder has partnered up with Matchroom Boxing promoter Hearn, with whom he previously held a feud for several years, after his deal to face the stable's Anthony Joshua fell through multiple times.
The 'Bronze Bomber' has now settled his dispute with Hearn, and will form part of his team in a bid to get back on track with a win over Zhang.
"Nobody ever thought me and Eddie would be working together. This is the ultimate surprise," Wilder said.
Hearn said: "For one night only, we work together."
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Wilder looked lacklustre in his last clash with Joseph Parker, labouring to a points defeat in December, but will be hoping a comeback win could revive his plan to touch gloves with Joshua later in 2024.
Another huge heavyweight showdown sits on the team format bill, with Warren's Daniel Dubois duelling with Filip Hrgovic, who is linking up with Hearn.
It is expected the pair will meet for the IBF heavyweight world title, which the winner of Tyson Fury v Oleksandr Usyk is likely to have to vacate after their May 18 showdown.
More world title action will take place on the card with Hearn's WBA featherweight world champion Ray Ford defending his title against Nick Ball - who fights for Warren's Queensberry.
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Ball was unable to win the WBC belt after being unfortunate in a controversial draw with Rey Vargas in December, but will be hoping to become world champion at the second time of asking.
Warren's mercurial prospect Hamzah Sheeraz will do battle with Hearn's undefeated talent Ammo Williams in another promising clash in the middleweight division.
Frank Warren vs Eddie Hearn Full 5 vs 5 Line-Up
Zhilei Zhang vs Deontay Wilder (Heavyweight)
Daniel Dubois vs Filip Hrgovic (Vacant IBF Heavyweight World Title)
Nick Ball vs Ray Ford (Ford's WBA Featherweight World Title)
Willy Hutchinson vs Craig Richards (Light-Heavyweight)
Hamzah Sheeraz vs Ammo Williams (Middleweight)
And to open the card, Warren light-heavyweight Willy Hutchinson will do battle with Craig Richards, who has rekindled his working relationship with Hearn.
It is a huge night of action, with some mouth-watering clashes set to put rivals Warren and Hearn in a direct head-to-head for the first time ever.
Boxing promoter Frank Warren teases 'super event' at Wembley in September ahead of the Riyadh Season in Saudi Arabia
The pair buried their feud under the control of Saudi boxing chief H.E. Turki Alalshikh, and will now compete to win points for each fight in the tournament.
A winner will be declared at the end of the card, depending on which promotion has accumulated the most points.
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