Their first fight in May was close. It went all 12 rounds, with Usyk hurting Fury badly in the ninth. In the end, Usyk won, handing Fury his first professional loss.
Usyk, the former cruiserweight champ, is 37 years old. He's known for his disciplined lifestyle and has less wear and tear than Fury. The Gypsy King, on the other hand, has had a tough run lately. He's coming off three hard fights with Deontay Wilder and even got knocked down by Francis Ngannou. Fury says he'll be more focused this time and won't underestimate Usyk.
Carl Froch, a former champion himself, thinks Usyk will win again. He told casino.org:
"I'd predict a Usyk win, probably on points. I couldn't rule out the late stoppage, because if Fury does go for it as he suggests he will, he could gas out towards the end of the fight. It would be great for British Boxing if Fury could win it, as then we might even see a third fight. It's just an incredibly tough ask for him."
Froch thinks Usyk's lifestyle and Fury's recent tough fights give the Ukrainian the edge. He says Usyk might even stop Fury late if the Brit runs out of steam.
But not everyone agrees. Lennox Lewis, the last undisputed heavyweight champ, believes Fury will win. He points to Fury's history of changing his style in rematches, like he did against Deontay Wilder.
The public can't seem to make up its mind. People are split on who'll come out on top. We'll have to wait until December 21 to see who's right.