Anthony Joshua will face Jake Paul in an eight-round fight which will be broadcast live on the streaming platform.
Briton Joshua said he will "dominate completely" the American and "defeat" his opponent as the combatants confronted each other to promote next month's bout.
Former twice unified heavyweight champion Joshua battles social media star turned fighter Paul - in what is, by the numbers, a huge uneven pairing - at Miami arena on December 19th.
Fighter's Mindset
"I'm going to break his face and damage his physique. I'm here to prove I'm superior," Joshua, 35 years old, said.
"I will dominate him completely. That's how fighters think.
"I intend to seriously aim to cause him pain. That's what I want to do."
Respectful Exchange
Despite these statements, a relaxed Anthony Joshua and internet personality Jake Paul - usually famous for his dramatics - were respectful and remained civil with each other.
Jake Paul rather targeted ex Joshua opponent the Cameroonian fighter and labeled him "not serious" after the Cameroonian rejected a bout proposal.
Targeting Tyson Fury
Anthony Joshua, meanwhile, took aim at UK opponent Fury - and declined a million-pound wager 'Tyson Fury' says he will place on a Paul win.
"[Paul] is better than Fury - he showed up," the boxer commented.
"I acknowledge that."
Serious Opponent
Despite declaring he will hurt Jake Paul, Joshua refused to speak negatively about his rival's fighting skills.
"Jake Paul is a legitimate boxer," he said.
Paul's History
Paul - who first rose to fame on the television network - has primarily boxed mixed martial artists or past-their-prime fighters since becoming pro.
He was defeated by Briton Fury in last year.
Financial Attraction
Still, the relative newcomer continues to be one of boxing's greatest money-making draws, regularly earning substantial paydays.
Forecast and Confidence
The 28-year-old predicted a stoppage in round four or five and stated he would stop the much-anticipated Fury-Joshua bout, which is reportedly in the works for two years from now.
"It will be myself against Tyson Fury next year," Jake Paul declared.
Physical Difference
As both boxers participated in the traditional face-off, with their size difference clearly visible, it highlighted just how improbable this entire matchup is - and how amazing it is that the fight is truly going ahead.