In his debut in October, he astonishingly floored Fury but it was not enough to avoid a controversial split-decision loss.
Ngannou still takes confidence from the performance and knockdown – which he doubts Joshua would have come back from.
He said in a DAZN face to face: “Yeah, I have a doubt about that. Tyson showed that he’s very resilient.
“I saw him come back from a knockdown that you wouldn’t believe.
“So I think he’s probably one of the most resistant person out there, and that’s not a disrespect to AJ.
“I don’t believe that AJ would take what Tyson did.”
But Joshua – with a stoic glare – hit back at Ngannou: “Who hasn’t knocked Tyson down? So many people have knocked Tyson down.”
Fury, 35, has been floored seven times in his career but bounced back to his feet every time to remain undefeated.
