Fury, 34, is set to face Joshua, 32, in a huge ‘Battle of Britain’ heavyweight bout in December.
Fury is set to fight Joshua in December[/caption]
A 60-40 purse split has already been agreed with the fight expected to take place at the Principality Stadium in Cardiff.
But, Charr, 37, has now urged the Gypsy King to fight him instead.
He took to Instagram to call out the current WBC heavyweight champion, writing: “I promise you on December 3.
“I will smash your pretty face you big dosser.
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“I focus this green and gold belt it’s coming home.”
Charr last fought in May, defeating Nikola Milacic with a third round knockout to extend his win streak to five.
Meanwhile, Fury retained his WBC title by knocking out Dillian Whyte in April at Wembley Stadium.
Diamond Boy has attempted to call-out the Gypsy King on multiple occasions in recent weeks.
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Earlier this month, he said: “Tyson, Tyson Fury, take the fight.
“I’m ready, I challenge you. Take my challenge, I’m ready for you, man. No excuses.”
But, Fury announced that he would only fight Charr if his highly-anticipated bout with WBA, WBO and IBF heavyweight champion Oleksandr Usyk falls through.