Tyson Fury has issued a fresh challenge to Oleksandr Usyk, responding to the latest comments from the Ukrainian where he referred to the WBC heavyweight champion as a 'crazy guy'.

Usyk successfully defended his belts against Anthony Joshua in last month's rematch, clearing the way for boxing fans to secure the unification fight they have long been waiting for on the heavyweight stage.

Fury had claimed he would retire following his win against Dillian Whyte in April but has since made it clear he is open to returning to the ring for a unification bout against Usyk.

Former middleweight fighter Usyk spoke about the prospect of facing off against Fury earlier this week, stating: "I want the WBC title. It was captured by the gypsies, some kind of king.

"We don't know what Tyson has in his head. Everyone knows that this is a very crazy guy. I would really like this fight to happen next year."

That sparked a fiery response from Fury, who directed jibes at Usyk's former middleweight status and named three prospective dates for a potential bout.

"Usyk, middleweight, you say you want the WBC and it's held by gypsies, it is held by gypsies and it's held by the gypsy king, it's held tightly," he said in a social media video.

"All rounds lead to a seven-foot behemoth who will absolutely destroy you, middleweight, you will get smashed to bits.

"You said you wanted to fight me after you beat the bodybuilder [Joshua], called me out on television, and now you're being a little b****, saying you've got injuries.

"You ain't got no injuries, you had a sparring contest. Get out and fight in December, you let your mouth go, now let's see if you can back it up.

"Doesn't matter if it's December, April or August next year, the outcome will be the same, I will obliterate you. I am a seven foot, 20 stone behemoth and I will destroy you. Find your balls, come see me."