Tyson Fury evidently is working on his smack talk as much as he is on his body.

The WBC heavyweight titleholder unloaded on his divisional peers Oleksandr Usyk and Anthony Joshua during a workout session on the treadmill. An amped-up Fury aimed his invective at countryman Joshua for relinquishing his WBA/WBO/IBO/IBF heavyweight titles to Ukrainian southpaw Usyk in their unification bout last September in London. Fury once possessed those belts after he defeated Wladimir Klitschko in 2015 to become the undisputed heavyweight champion.

“You know what I can’t believe? That ‘AJ’ has gone and given Ukraine all the heavyweight belts back after all my hard work in [retrieving] them,” Fury said in a video posted on his Instagram story. “You big useless dosser!”

Fury (31-0-1, 22 KOs) wasn’t finished. The Manchester native also took a shot at Usyk, a former unified cruiserweight champion, albeit in indirect fashion. Fury referred to Usyk as a “steroid man,” perhaps in reaction to the fact that Usyk is not a career heavyweight.

“You’ve let a little steroid man come up from middleweight and sit above you and take all your belts,” Fury said. “It will take a real British Lancaster bomber like me to go and relieve the useless little…get the belts and get them back to Britain.”

Usyk, to be sure, has never tested positive for a steroid or a banned substance in the professional ranks. Fury, on the other hand, tested positive – along with cousin Hughie Fury – for nandrolone, an anabolic steroid, in 2015 right after defeating Christian Hammer. UKAD, the body that administers drug testing in boxing in the UK, did not charge Fury until June 2016. In 2017, the parties agreed on a backdated two-year ban, which allowed Fury, whose life at that point had spiraled out of control during that period with excessive weight gain, drug use, and mental health issues, to return to the ring in 2018. Fury has denied he has ever taken a banned substance and has maintained that the positive finding was a result of eating uncastrated wild boar.

Fury, 33, is coming off a 11th round TKO of rival Deontay Wilder in their heavyweight title bout last October.

“You useless dossers!” Fury continued. “Honestly, bring ‘em to me, the Gypsy King. Bring ‘em to me! And I will put ‘em into place. I’ll relieve ‘em of the belts again.”

Joshua (24-2, 22 KOs) and Usyk (19-0, 13 KOs) are scheduled to face each other in a rematch sometime in the spring, perhaps in April; a specific date and location as of this time have not been decided.

As for Fury, he is also expected to make a return to the ring this spring, but it is not clear whom he will face. Countryman Dillian Whyte is his WBC mandatory but Whyte’s litigation with the sanctioning body and his reported excessive purse demands may make that bout an impossibility.