Tyson Fury claims Anthony Joshua is backing out of their much-anticipated all-British heavyweight showdown and has challenged Oleksandr Usyk to a trilogy fight.

Fury and Joshua have been locked in talks over a long-awaited meeting but the “Gypsy King” is impatient at a lack of confirmation, calling his rival a “coward” last week.

The two former heavyweight world champions are expected to meet in November but the location of the fight has yet to be agreed.

In an expletive-laden video posted on Instagram, Fury, 38, claimed Joshua was pulling out of the fight.

“This will only lead me to a fight with Oleksandr Usyk,” he said. “Oleksandr you’re his (Joshua’s) trainer and his sensei and you know he is… weak-minded… and that he would never fight the Gypsy King, which you have had the guts to do twice.