Oleksandr Usyk and Tyson Fury are now within a month of renewing their rivalry for three of the four world heavyweight titles.
Back in May, all four belts were on the line as the sport crowned its first undisputed heavyweight champion since Lennox Lewis in 2000.
After Usyk came out on top in a thrilling bout in Saudi Arabia, a rematch in the Middle East was inevitable as Fury bids to respond to suffering his first defeat in the professional ranks
Here, Sports Mole rounds up everything that you need to know ahead of the mammoth showdown that is due to take place on December 21.
The first fight
Ahead of the first instalment, the general consensus was that Fury may simply be too big for Usyk. At 15cm taller and 39lbs heavier, it was difficult to dispute that opinion.
The first six rounds suggested that the majority would be proven correct. Fury's showboating contributed to Usyk taking the first round, yet the Briton grew into the fight and established firm control.
For the first time in his career, it seemed as though Usyk was getting beaten up. Fury landed blows that would have discouraged the standard human being, his Ukrainian foe seemingly on course to being battered into submission.
© Imago
However, rather than stick with a strategy that was proving ineffective, Usyk went on the attack and seized the fight from Fury's grasp, landing more frequently in rounds seven and eight before a ninth round that will live long in the memory.
With 30 seconds remaining, Usyk landed a thudding left that sent Fury onto the ropes, following up with a barrage of punches that forced the WBC belt holder to take a count.
Fury deserves credit for finishing the fight, partially helped by Usyk not continuing at the pace that he had set in the previous three rounds. Fury was also awarded the 12th round by all three judges, yet the vast majority of observers felt Usyk had prevailed before the scorecards were revealed.
Although Fury received a 114-113 verdict with one judge, the other two gave it 115-112 and 114-113 to Usyk, leaving him as the IBF, WBA, WBC and WBO champion.
Why all four belts will not be on the line
Soon after making history, Usyk had a decision to make. His IBF mandatory was due and the governing body were not prepared to accept any exceptions.
At the start of June, Daniel Dubois defeated Filip Hrgovic to take the mandatory status away from the Croatian, theoretically setting up a rematch with Usyk later in the year.
Instead, Usyk vacated on June 25, allowing Dubois to face Anthony Joshua for the IBF title at Wembley in September. Usyk remains with the WBA, WBC and WBO titles, and mandatories will be due for whoever emerges victorious in Riyadh.
© Imago
Where to watch
On November 20, it was announced that DAZN had priced the pay-per-view event at £24.99 for fans from the United Kingdom.
At the time of writing, price points for Sky Sports and TNT Sports had not been revealed.
The main event is expected to take place at approximately 11pm (BST).
Undercard
As per November 22, five fights had been set for the undercard, including the super-welterweight clash between Serhii Bohachuk and Israil Madrimov, the former WBA champion.
The European super-bantamweight title will be on the line in an all-British clash between champion Dennis McCann and challenge Peter McGrail.
There are a further two heavyweight clashes on the card, with Johnny Fisher hoping to earn valuable rounds against Dave Allen and highly-rated prospect Moses Itauma taking on Australia's Demsey McKean.
At featherweight, there is a clash between Isaac Lowe and Liam McGregor, both fighters needing a notable win to move them back up the world rankings.
