WBC heavyweight champion Tyson Fury has fired back at Oleksandr Usyk - after the unified WBO, IBF, IBO, WBA champion took to social media to take a swipe at Fury.

Usyk recently went on social media and took a jab at Fury - calling him "belly" and stating "Where are you?"

The two unbeaten beltholders are in serious negotiations to collide in the coming months - with the bout landing in the Middle East or the UK.

Fury, in expected fashion, lashed out at Usyk over his callout.

"Usyk, calling out the Gypsy King with your pathetic little callouts, dosser," Fury said.

"Rabbit, I'm coming for you rabbit. You're getting it rabbit. And I'll tell you what else, I'm going to bust you up real bad you little middleweight. I'm going to slap you into a big pile of tattoos, sucker."

Top Rank's CEO Bob Arum, who co-promotes Fury, recently explained to BoxingScene.com that he's waiting for a concrete offer from the Middle East. The fighters would have a 50-50 split in their deal.

But, if the contest lands in the UK - Arum indicates that Fury would need a bigger slice of the pie.

“Everybody agreed that if [Saudi Arabia’s] offer comes through and it’s real, that’s how we’ll go. If not, we’ll do the fight at Wembley," Arum told BoxingScene.com.

“The fighters have agreed to fight. I spoke to Frank Warren. We’re giving them until [this] week to come with their offer, which I believe we’ll get. If we don’t, then we’re gonna do the fight at Wembley. And then we’d have to talk about the percentages because Usyk wants 50-50. That’s not right if the fight’s at Wembley because there will be 95,000 Brits at the fight and big Brit pay-per-view money, so Tyson deserves the lion’s share.

“But we don’t get to that point if the [investors in Saudi Arabia] come through, because the way they operate is they make deals with each of the fighters. We’ve been led to believe that they’re going to come with a proposal [this] week. I’ll believe it when I see it, but it’s not like they haven’t come through in the past.”