The British boxer is set to fight Jake Paul in an eight round match which will be streamed in real-time on the streaming platform.
British boxer Joshua stated he will "overwhelm entirely" Jake Paul and "break" his opponent as the pair came face-to-face to build hype for the upcoming heavyweight fight.
Former two-time world title holder Anthony Joshua battles YouTuber-turned-boxer Paul - in what is, theoretically, a mammoth disparity - at Miami's venue on 19 December.
"I will damage his features and break his body up. I aim to demonstrate I'm superior," Joshua, 35, stated.
"I will dominate him completely. That's the boxer's mindset.
"I intend to genuinely try to injure him. That's what I want to do."
Despite such comments, a relaxed Joshua and internet personality Jake Paul - normally recognized for his showmanship - were respectful and maintained decorum with each other.
Paul instead criticized former Joshua rival the Cameroonian fighter and called him "a joke" after the Cameroonian declined a match opportunity.
Joshua, in the meantime, criticized UK rival Tyson Fury - and refused a large bet 'Tyson Fury' says he will place on a victory for Paul.
"Jake Paul is better than Tyson Fury - he's actually sitting here," Joshua stated.
"I respect him for that."
In spite of stating he plans to punish Paul, Joshua declined to speak negatively about his rival's fighting skills.
"Jake Paul is a credible opponent," he remarked.
Paul - who first rose to fame on the Disney Channel - has mostly boxed MMA fighters or past-their-prime fighters since entering professional boxing.
He lost to Briton Tommy Fury in last year.
Still, the relative newcomer is still one of the sport's greatest money-making draws, consistently making substantial financial rewards.
The 28 year old forecast a knockout win in rounds four or five and asserted he would prevent the much-anticipated Fury-Joshua bout, which is apparently in the works for two years from now.
"It will be myself against Tyson Fury in the coming year," Paul stated.
As Joshua and Paul met for the traditional face-off, with their height and weight contrast evident, it drove home just how surprising this whole event is - and how astonishing it is that the bout is really happening.