Saturday evening will be the biggest of Tyson Fury's already illustrious career.
The Gypsy King may have beaten Wladimir Klitschko in Dusseldorf to become the heavyweight champion of the world, but this is a whole new ball park.
Fury has only fought twice in the three years since his famous victory over Klitschko, spending nearly two-and-a-half years out of the sport.
But now, after two low-profile comeback fights, he's taking on one of the most dangerous heavyweights of the modern era in Deontay Wilder - the current WBC champion.
If Fury can topple the Bronze Bomber after his dramatic body transformation, it will be one of the biggest statements in the history of the sport.
In the build-up to the super-fight at the LA Staples Centre, the Gypsy King has been sparring with British cruiserweight Lawrence Okolie - the WBA Continental champion.
Prior to the two Brits sparring, Okolie believed Wilder would stroll to victory.
However, his opinion on how the fight will play out has changed drastically ever since sparring with Fury for three weeks in his camp.
Speaking to iFL TV, Okolie said: “I’d say Tyson is on a completely different planet from him [Wilder] in terms of boxing IQ. Before I went out there, I believed Wilder would take him out in four rounds... Fury will either drown him late or win on points.”
Well, when it comes to pre-fight predictions, a man who has sparred hundreds of rounds with one of the competitors is certainly an opinion to take on-board.
Many boxing fans have said Okolie is the perfect man to spar in preparation for facing Wilder.
Much like the Bronze Bomber, Okolie has a rather awkward, unorthodox style that does yield positive results.
Whether it will prove decisive is another matter entirely, with Wilder possessing the power in his right-hand to end the fight at any moment - something Okolie does not have in his locker.