Tyson Fury and Deontay Wilder produced a trilogy fight for the ages when they met in Las Vegas last month.
Fury was knocked down twice before sending Wilder crashing to the canvas in the 11th round in a successful defence of his WBC title.
However, it turns out Tyson wasn't fully fit for the fight, according to his father John Fury.
In an interview with BT Sport, John Fury said: "It wasn’t a boxing match was it? Because Tyson was very badly injured going into that fight.
"He had to have chromosome injections into both elbows, both elbows were numb.
“He’s since had an operation, six hours, all day in hospital having to sort out his elbows."
This in John Fury's eyes had affected the quality of the fight between Fury and Wilder.
"I think he had some bone spurs that he had to get removed – common thing in boxers, he was handicapped from the beginning.
“But the boxing side of it went out the window because I knew he was going to be like that from [early] on.
“When I seen the look in his eyes, he just wanted to seek and destroy. And that’s what he did."
Watch The DAZN Boxing Show discuss whether Tyson Fury vs. Dillian Whyte will actually happen next year below.