"I'm here" - Oleksandr Uzyk exaggerates his muscles while calling out Tyson Fury, who is posing in front the Ukraine flag

OLEKSANDR USYK flexed his muscles and called out heavyweight rival Tyson Fury while posing in front of a Ukraine flag.

The WBA, IBF, and WBO heavyweight champ, 36, is expected to do battle with WBC champ Fury, 34, in Saudi Arabia in April this year.

However, a date and venue is yet to be confirmed.

Fury‘s promoter, Frank Warren, said: “The fight will take place 100 per cent the last Saturday in April.

“Where it takes place I genuinely think will be determined within the next six or seven days maximum.

“If we can’t do what we’re being asked to do with Tyson and Usyk [in Saudi Arabia], then the fight will take place in the UK.”

The pair have been going back and forth on social media, with Usyk handing Fury a nickname, branding the Gypsy King “belly”.

And now Usyk has taken to Twitter to call out Fury, flexing his muscles while captioning the post, “I’m here.”

Usyk has also decided to grow his hair out, instead of maintaining a clean shaven look.

The Ukrainian posed in front of his country’s colours of yellow and blue.

After the two kings of the heavyweight division do battle, Fury could take on ex-UFC star Francis Ngannou.

Ngannou has accepted Fury’s calls for a hybrid boxing match.

The Predator has no qualms with Fury’s ruleset for a freak show fight – which he wants to be reffed by boxing legend Mike Tyson.

When is Tyson Fury vs Oleksandr Usyk? Date, TV channel – everything we know so far