The British boxer will face Jake Paul in an eight-round fight which will be shown in real-time on the streaming platform.
Briton Joshua said he will "overwhelm entirely" the American and "break" the American as the two fighters met personally to build hype for next month's heavyweight fight.
Former two-time unified boxing king Anthony Joshua faces YouTuber-turned-boxer Jake Paul - in what is, theoretically, a massive disparity - at Miami's venue on 19 December.
Boxer's Mentality
"I plan to break his face and damage his physique. I'm here to prove I'm superior," the British boxer, 35, said.
"I will dominate him completely. That's how fighters think.
"I will seriously aim to injure him. That's my goal."
Civil Interaction
Despite these statements, a calm Anthony Joshua and social media star Paul - usually famous for his showmanship - were respectful and maintained decorum with each other.
Paul rather attacked ex Joshua rival the Cameroonian fighter and described him as "a joke" after Ngannou rejected a fight offer.
Targeting Tyson Fury
Joshua, meanwhile, criticized UK opponent Fury - and rejected a £1m bet 'Tyson Fury' says he will place on a victory for Paul.
"[Paul] outshines Tyson Fury - he's present here," the boxer commented.
"I acknowledge that."
Serious Opponent
Despite saying he intends to damage his opponent, Joshua chose not to talk badly about his rival's boxing ability.
"Jake Paul is a credible opponent," he stated.
Jake Paul's History
Jake Paul - who originally gained popularity on the television network - has mainly fought MMA fighters or declining opponents since entering professional boxing.
He lost to British fighter Tommy Fury in last year.
Financial Attraction
Still, the inexperienced fighter continues to be one of boxing's largest financial successes, frequently receiving huge earnings.
Prediction and Confidence
The 28 year old anticipated a KO victory in rounds four or five and asserted he would stop the long-awaited match between Joshua and Fury, which is apparently being planned for 2026.
"It will be my match with Fury next year," Jake Paul said.
Physical Difference
As Joshua and Paul participated in the usual face-off, with their physical disparity evident, it highlighted just how improbable this complete situation is - and how amazing it is that the match is really going ahead.
