The 56-year-old blamed a 'complete idiot' who weighed 17 stone for breaking his son's ribs with a 'bare knuckle' fist, that ruled him out of the match-up.
Along with the broken ribs, Tommy was said of picked up a chest infection, which meant that the long-awaited grudge match on December 18 was called off.
John told Behind The Gloves: "He's had a bacterial chest infection for about six or seven weeks, but that didn't bother us, we were going to battle through that.
"But owing to a complete idiot in the gym, punched him in the ribs. A man of 16 or 17 stone with his bare knuckle, punched him in the ribs and broke his ribs.
"At the end of the day, I was horrified, we were going to try and battle through it, because when we got him x-rayed they said, 'No, it's just bruised, it's ligament damage'.
"And then, he was sparring and he couldn't throw a punch, he couldn't move. He said, 'Look, I'm in bad pain dad'.
"He said to Tyson, 'I'm in bad pain, I can't move'. So, I took him to a specialist in Manchester, they x-rayed him properly and the finding was there.
"Broke ribs, what can you do? Chest infection, broke ribs, it's unfortunate, it's cost a lot of money, people have lost a lot of money, the disappointment is immense for Tommy and us.
"But, we'll bounce back, we're fighters, if you want to reschedule, that's not a problem."
He added: "He sucked the life out of the Fury name for three months, he's had his money's worth.
"But I'll tell you what Jake Paul; if you're any kind of a man at all mate, let's renegotiate this fight for March or I'll come to America and give you and your brother a good hiding.
"I'll slap the pair of you with my backhand, I told you. Don't keep mentioning me, be careful what you wish for pal.
"Because, you know what? I'll just come and backhand the pair of ya. But Tommy, don't worry about it my friend, he will at some point meet you.
"Because there's no other fight out there. Who's going to generate big money? Only Tommy Fury."
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