Former heavyweight world champions Anthony Joshua and Deontay Wilder will fight separate opponents on the same night as part of a stacked card on 23 December in Riyadh, Saudi Arabia.
Briton Joshua will face Otto Wallin, with American Wilder taking on former champion Joseph Parker.
If Joshua and Wilder both win, they could fight each other in 2024.
On the undercard, WBA light-heavyweight champion Dmitry Bivol defends his title against Manchester’s Lyndon Arthur.
Tyson Fury v Oleksandr Usyk was set to headline the event, but Fury’s difficult encounter with Francis Ngannou last month derailed those plans.
Joshua and Wilder are on the comeback trail since losing their world titles to Usyk and Fury respectively.
Joshua, 34, is promoted by Matchroom Boxing and Eddie Hearn, while 38-year-old Wilder has spent most of his career with Premier Boxing Champions and adviser Al Haymon, as well as being managed by Shelly Finkel.
Joshua is a two-time world champion with a record of 26 wins – including 23 stoppages – and three defeats.
Sweden’s Wallin, 32, has lost just once in 27 outings – a points defeat by Fury in 2019.
Wilder is one of the greatest knockout punchers in heavyweight history, with 42 stoppages in 43 wins. The only blemishes on his record – two defeats and a draw – have been at the hands of Fury.
