The fight is than two weeks away.
Anthony Joshua will attempt to reclaim his world titles on December 7th in Saudi Arabia, when he challenges IBF, WBO, WBA, IBO heavyweight world champion Andy Ruiz.
Back in June, Ruiz shocked the world when he dropped Joshua four times to secure a seventh round stoppage at Madison Square Garden in New York City.
The first time around, Ruiz came in on late notice after the original opponent, Jarrell Miller, was pulled out when he failed three drug tests.
Both Joshua and Ruiz have made adjustments for the second fight.
Joshua has slimmed down, cutting down on some of his muscle - which he believes will help his mobility and stamina in the rematch.
“When you want to start adding all these different technologies to your game, one percent here and there, it’s a load of sh-t to be honest. Andy Ruiz Jr for example, little fat pig, comes in on three weeks notice, murdered every donut and taco in California, goes in with a guy who had a 12-week training camp with every sport scientist in the UK," Fury told the True Geordie podcast.
“[Joshua] has broken every heart monitor in sight, he’s been every cross-fit machine, been on the best diet you can get, but the fat fella goes in there and bowls him over in seven rounds.
“I see the rematch going pretty much similar to the first fight, I know they both lost some weight and there’s more time to prepare and all that, they’ll have different game plans. But Mike Tyson said ‘everyone’s got a great game plan until you get punched in the face’.
“I don’t think that Ruiz Jr is too good, but my opinion is he’s won already and knocked him out so he’s got a mental edge going into the rematch. Joshua is going into it mentally beaten already because he’s been knocked out. Boxing is 95 per cent in the mind anyway. It wasn’t a lucky punch, I gave Joshua one round out of the seven. Everyone has a boogeyman in their career, I think personally that Ruiz Jr is the boogeyman for Joshua."
Fury believes Joshua will likely retire from the sport if he suffers another knockout loss at the hands of Ruiz.
“If Joshua gets knocked out twice in a row, I can’t see him continuing to be fair. He doesn’t need the money and two KO losses is shattering to your career," Fury said.