The British boxer is set to fight Jake Paul in an eight round contest which will be streamed in real-time on the streaming platform.
Briton Joshua said he will "stamp all over" the American and "defeat" his opponent as the combatants met personally to build hype for next month's bout.
Former twice unified title holder Joshua battles YouTuber-turned-boxer Paul - in what is, theoretically, a massive uneven pairing - at Miami's arena on 19 December.
Boxer's Attitude
"I plan to injure his face and break his body up. I'm here to prove I'm the better fighter," the British boxer, 35, declared.
"I'll stamp all over him. That's a fighter's mentality.
"I'm going to genuinely try to hurt him. That's my goal."
Civil Exchange
Despite such comments, a composed Joshua and social media star Jake Paul - typically known for his theatrics - shared friendly words and remained civil with each other.
Jake Paul rather targeted ex Joshua rival the Cameroonian fighter and called him "ridiculous" after Ngannou declined a fight offer.
Taking Aim at Fury
Joshua, in the meantime, criticized UK rival Tyson Fury - and declined a large bet 'Tyson Fury' says he will place on a Paul win.
"Jake Paul is better than Fury - he's actually sitting here," the boxer stated.
"I respect him for that."
Serious Opponent
Despite saying he intends to damage his opponent, Joshua declined to talk badly about his opponent's fighting skills.
"Jake Paul is a legitimate boxer," he stated.
Paul's Background
Paul - who first rose to fame on the Disney Channel - has mainly boxed MMA fighters or declining opponents since becoming pro.
He was defeated by British fighter Tommy Fury in last year.
Commercial Attraction
Nevertheless, the inexperienced fighter continues to be one of boxing's biggest financial successes, regularly earning huge earnings.
Prediction and Belief
The 28-year-old predicted a stoppage in rounds four or five and stated he would derail the highly-expected Joshua–Fury fight, which is reportedly under discussion for two years from now.
"It's going to be myself against Tyson Fury next year," Jake Paul said.
Physical Disparity
As Joshua and Paul participated in the traditional face-off, with their physical disparity clearly visible, it highlighted just how improbable this whole event is - and how astonishing it is that the match is actually proceeding.
