Tyson Fury didn’t waste any time in contradicting his latest retirement claim.

Naturally, it came at the expense of the only other heavyweight on the planet who matters in the sport’s long-desired quest to crown an undisputed champion in boxing’s most storied division.

The unbeaten two-time lineal heavyweight champ offered harsh criticism of Oleksandr Usyk’s second straight win over Anthony Joshua. Ukraine’s Usyk (20-0, 13KOs) was forced to settle for a strangely scored split decision to retain his unified WBA/IBF/WBO/IBO heavyweight titles Saturday evening in Jeddah, Saudi Arabia.

Most observers were impressed with the repeat feat by Usyk, to the point of reaffirming his place atop the mythical pound-for-pound rankings. The feedback offered by Fury (32-0-1, 23KOs) was in stark contrast to such claims.

“I have to be honest with you guys. After watching that, the both of them were shite,” Fury insisted in a rant posted to his Instagram story immediately after the fight, while hosting a viewing party for the Sky Sports Box Office/DAZN event. “It was one of the worst heavyweight title fights I’ve ever seen. It was bullsh!t. I would annihilate both of them on the same night. It was f------ sh!te.”

England’s Fury claimed to be done with the sport in the moments after his sixth-round knockout of countryman Dillian Whyte this past April 23 in front of 94,000 fans at the famed Wembley Stadium. Few in the sport believed it would stick, given how much money there was to be made in his facing the Usyk-Joshua winner which at the time was still pending a fight date.

Both fighters in Saturday’s main event have expressed a strong interest in next facing the unbeaten Fury. Such a fight would produce the sport’s first undisputed heavyweight champion since Lennox Lewis held the honor more than 22 years ago. Fury continues to dismiss interest in such a fight, carrying out his retirement claim to even vacating his Ring Magazine title which was since awarded to Usyk following his latest victory.

Fury will have until August 26 to decide whether to keep the WBC title, or to relinquish the one physical belt still in his possession. All four sanctioning bodies will be on board for a Fury-Usyk clash even with the number of mandatory challengers waiting in the wings, though such a fight would apparently come at a considerable cost.

“Get your fuckin’ checkbook out because the Gypsy King is here to stay FOREVER,” insists Fury.

His lone divisional threat is not only prepared to meet the challenge but also vows to never enter the ring for any other fight.

"I'm sure Tyson Fury is not retired yet,” Usyk stated in the ring, immediately following his win over Joshua. “I'm convinced he wants to fight me. I want to fight him. If I don't fight Tyson Fury, I'm not fighting at all."

Jake Donovan is a senior writer for BoxingScene.com. Twitter: @JakeNDaBox