JOHN FURY declared that Anthony Joshua did not have the desire to beat Oleksandr Uzyk at Tottenham Hotspur Stadium.
AJ was defeated by the Ukrainian in September. Fury, however, stunned Deontay Wilder in Las Vegas earlier in this month.
Tyson's dad John has questioned Joshua's spirit
Joshua's defeat ended plans for an all-British fight between Fury and Fury.
Fury Sr believes that there is only one winner in a face-off.
The True Geordie Podcast was told by him: "You only have to look at Joshua’s body language after the fight and his behavior on the stool. He behaved as a warrior.
"If Tyson is your eyes, and Deontay wilder your eyes - Deontay wilder [never] dipped much to say that I've given you all I can do anymore, he was just out of his mind."
"He didn't feel discomforted or make any emotion, he just wanted to soak it all in.
"Deontay Wilder was a fighter, and he didn't have any other options. He was probably trying to be conscious while he was sitting on his stool.
"AJ did nothing wrong. You can only do what is possible in boxing.
"He just doesn't have the desire or will to do it - not even a quarter of the time of Wilder and my son."
"Honestly, he's been an excellent champion, but has he ever beaten these two men?" He's not as powerful as Wilder, and he doesn't have the ability to knock out Wilder with one punch.
John cannot see Joshua defeating Wilder or Fury if Joshua ever does fight.
The Bronze Bomber was honored for withstanding Fury fire during their fight and twice rising from the ground before being finally dropped by the Gypsy King.
Joshua was meanwhile on the ropes during the final seconds of his bout against Ukrainian Usyk.
Even his corner said not to knock AJ out.
Joshua and Fury were likely to meet if Usyk, a former cruiserweight fighter from Watford, had defeated Fury.
However, his points loss means that he has used his rematch clause to defeat the man who caused him his second defeat - with the bout scheduled for the Spring.
Fury, 33 years old, will be fighting the winner of Dillian Howte and Otto Wallin at the O2 Arena on September 30, 2013.
Fury's WBC belt will be defended by the winner of this clash.
