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And Joshua, who weighed in at 240.8lbs (3.8lbs heavier than when he fought Andy Ruiz Jr last December), entered into a war of words with Pulev during their face-off.
Pulev's younger brother, Tervel, claimed that the 39-year-old Bulgarian shouted "I will destroy you" during the exchange as security had to separate the two heavyweights.
Joshua's opponent also added: "I told him that I am ready and that I respect him, he is Olympic and world champion, so I respect him so much.
"But I am the better boxer and I told him that I will show him tomorrow and he did not like that.
"His reaction did not surprise me, it was normal, he is the world champion, for now.
"It's his last day as world champion. Tomorrow will be different."
Sky Sports has since posted the exchange on Twitter to show exactly what Joshua and Pulev said to one during their war of words.
Matchroom chief Hearn recalled the incident and suggested that Joshua had called Pulev a "p***y" in their heated spat.
Joshua's promoter explained: "Pulev just kept saying, 'Tomorrow, tomorrow,' so Joshua went, 'What do you mean tomorrow?'
"Pulev kept talking so Joshua said, 'Come over here and say it.' Pulev said again 'Tomorrow I'll beat you' and 'AJ' said, 'What? You? Disrespect me and I'll show you' and then he said, 'You're a pussy.' They wouldn't stop."
Following the face-off with Pulev, 'AJ' said: "I don't know what sparked that. That's just how we are.
"He has spoken a lot of rubbish and now he has to back it up.
"I have seen so many fighters talk a load of rubbish and then get smacked up. If you don't know boxing, then that sort of thing could intimidate you, but I could have whacked him up there but I have to save it for tomorrow.
"I have studied him and he thinks he is a warrior but he is up against a real one now.
"When people come in the ring with me, they are confident but I take their soul away and get them out of there."
Featured Image Credit: Sky Sports
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