Before Deontay Wilder and Tyson Fury head to the MGM Grand ring in Las Vegas on Saturday night there's a whole undercard of action to enjoy.
Depending on how quickly the earlier contests end, the main event is expected to start some time between 4am and 5am UK time.
There are nine bouts before the Gypsy King and the Bronze Bomber collide and here we preview them, and the likely outcomes.
Charles Martin v Gerald Washington
The chief support is an eliminator for IBF version of the heavyweight title, currently held by Anthony Joshua following his unanimous decision over Andy Ruiz junior in December.
British fight fans' sole memory of 'Prince' Charles Martin was the meek manner in which he was dethroned by Joshua in 2016.
But since then Martin has done a respectable job of rebuilding his reputation.
He has won four and his only loss was a gutsy points defeat to unbeaten Adam Kownacki.
Washington was stopped by the same man inside two rounds in Kownacki's very next fight.
That form line suggests Martin will be triumphant, 2/9 with thepools.com , while Martin by stoppage is 4/6 .
Emanuel Navarrete v Jeo Santisma
The second world title on the line in Las Vegas is Navarrete's WBO super-bantamweight belt, a title he has held since 2018.
He has defended it four times since, inside the distance every time - and while he's an unbackable 1/33 to beat Jeo Santisima and 1/10 to do it inside the distance again, his last three outings haven't been past the fourth round and the fight to finish in rounds 1-3 is 6/4 and rounds 4-6 is 9/5 , which look like solid tips.
Amir Ahmed Imam v Javier Molina
Imam was outpointed by Jose Ramirez in 2018 on his first bid for world title glory - but bounced back in trademark fashion, securing his 19th stoppage victory over Marcos Mojica.
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Beijing Olympian Javier Molina doesn't have anything like the same punch power and is 9/5 to score an upset win over his 4/9 rated opponent.
Sebastian Fundora v Daniel Lewis
This is a real little and large match up.
Yet curiously the six feet six inch tall Fundora prefers to mix it inside rather than keeping the action at long range and that will aid Lewis, who at five feet 8 inches is short for a light-middle.
Thepools.com make Fundora 1/4 favourite but if you're looking for an upset on the bill Lewis shouldn't be 16/5 .
Fundora was outboxed for large parts of his last contest when he drew with Jamontay Clark and the greater aggression from the 2016 Olympian can see Lewis score an upset victory.