The British boxer will face Jake Paul in an eight-round match which will be shown in real-time on Netflix.
Briton Joshua said he will "dominate completely" the American and "overpower" the American as the pair confronted each other to publicize next month's heavyweight fight.
Ex two-time unified heavyweight champion Anthony Joshua battles social media star turned fighter Jake Paul - in what is, on paper, a huge mismatch - at Miami's arena on December 19th.
Boxer's Mentality
"I will break his face and damage his physique. I'm here to prove I'm the better fighter," the British boxer, 35, stated.
"I'll stamp all over him. That's the boxer's mindset.
"I will genuinely try to hurt him. That's my intention."
Civil Interaction
In spite of such comments, a composed Joshua and internet personality Paul - normally known for his theatrics - were respectful and maintained decorum with each other.
Paul instead targeted former Joshua's rival Francis Ngannou and described him as "a joke" after the Cameroonian rejected a fight offer.
Taking Aim at Tyson Fury
Joshua, meanwhile, criticized British opponent Tyson Fury - and refused a large bet 'The Gypsy King' says he will place on a Paul victory.
"Jake Paul is superior to Fury - he's present here," Joshua commented.
"I give him credit for that."
Legitimate Opponent
Despite saying he intends to punish Paul, Joshua chose not to speak negatively about his opponent's fighting skills.
"Jake Paul is a legitimate boxer," he remarked.
Paul's Background
Jake Paul - who first rose to fame on the television network - has primarily fought mixed martial artists or declining opponents since entering professional boxing.
He was defeated by Briton Tommy Fury in last year.
Financial Attraction
Nevertheless, the novice remains one of boxing's greatest money-making draws, regularly earning huge financial rewards.
Prediction and Confidence
The 28-year-old forecast a stoppage in round four or five and asserted he would prevent the highly-expected Fury-Joshua bout, which is apparently being planned for two years from now.
"It will be my match with Fury in the coming year," Jake Paul stated.
Physical Disparity
As both boxers engaged in the usual confrontation, with their physical disparity on show, it drove home just how unlikely this complete situation is - and how amazing it is that the match is truly happening.