TYSON FURY has pinpointed Anthony Joshua's Achilles heel after his devastating KO.
The Brit was on the canvas four times against Andy Ruiz Jr before the ref finally stopped the scrap in the seventh round.
3 Ruiz rocked Joshua with some bruising left hooks that ultimately dropped him to the canvasCredit: Alamy Live News
AJ will get the chance to win back his belts when he faces Ruiz Jr for the rematch in either November or December.
And Fury, who takes on Tom Schwarz in Las Vegas on Saturday, believes the Mexican just needs to clock him with one good left hook to win the fight.
Speaking to iFL TV, the Brit said: "He’s got a very leaky defence; he’s not a defensive slick fighter, he looks very vulnerable to me and very chinny.
“I think the full left side of his head is very vulnerable, any crack on that side, temple or jaw and he takes three rounds to recover.
“So anybody who wants to fight Joshua just needs to go out there and bombard him with 25 hooks one of them will land and it’ll be over."
Ruiz isn't the first fighter to have targeted Joshua with the left hook.
Mihai Nistor, Dillian Whyte, Wladimir Klitschko and Alexander Povetkin have all wobbled him with the same punch to the head.
Fury has called on AJ to retire for good if he suffers yet another defeat to Ruiz Jr at the end of the year.
He added: "I don’t think he’s a better boxer than Ruiz, so the only thing that AJ can do is knock him out early.
“He’s not a better boxer, he hasn’t got better feet, he doesn’t have faster hands and he doesn’t throw better combinations. So he’s coming off second best in every single category apart from athleticism and size.
most read in boxing'JUST PLAYING MYSELF' Fury relieved not to be 'pantomime villain' after becoming cult hero VideoBAZOOKA Watch the moment boxing star Seals KOs rival Brooker with shocking punch FUR SURE Fury watching brother Tommy on Love Island and says show will 'elevate his career' I'M NO DOPE Joshua slams Whyte claims he lost to Ruiz because he couldn't 'legally dope' AnalysisRUIZ VS SCHWARZ Why Fury’s opponent is less likely to cause a shock than Joshua’s conqueror A ROYAL PARDON Kid Galahad reveals Prince Naseem Hamed helped him stay out of prison Fury-ous Fans fear Tyson Fury's Twitter was hacked after he loses a million followers KISS GOODBYE Fury claims AJ WANTED to go down and needs to 'get shot of every a***kisser' PAY-J Joshua to bank £18m six years after 'robbing b*****d' Hearn gave him £15k on debut ROUND UP All the latest including AJ v Ruiz date and major fears over Wilder v Fury trilogy
“If you look at history, the ones that do take the rematch get usually chinned.
“If you can’t beat Andy Ruiz Jr, you can’t do anything to Tyson Fury or Deontay Wilder. Or any other decent heavyweight in the world.
“If he can't beat Andy Ruiz Jr in the rematch, he’s finished – done, finished, goodnight, bye-bye. He needs to retire – simple as, forget about it, give it up as a bad job."
3 Tyson Fury has pinpointed AJ's weaknessCredit: PA:Press Association
3 The Brit will have the chance to win his belts back at the end of the yearCredit: PA:Press Association