Usyk, 37, was set for a showdown with Fury on February 17 before the fight was pushed back to May 18 after the Gypsy King sustained a freak cut in sparring two weeks before the fight.
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But despite the push back, Usyk is taking no chances.
The Ukrainian shared a clip to his Instagram page of himself in training where he could be seen eating punches.
He took a number of consecutive blows to his body while in the gym.
Reacting to the clip, one fan said: “Gives him the edge over Tyson with more time in training.”
A second fan said: “This is just mind games but Usyk knows exactly what he’s doing.”
A third said: “He knows what put him down last time.”
Another added: “He’s putting this out there so Fury actually fights him.”
Fury, 35, and Usyk have agreed to cough up £8million if the fight is cancelled.
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Meanwhile, Usyk sent a chilling warning to Fury ahead of the fight.
He said: “Tyson, hi my brother.
“Don’t be afraid. I will not leave you alone.”
Usyk holds the WBA, WBO and IBF heavyweight belts, while Fury holds the WBC.
TYSON FURY VS OLEKSANDR USYK: ALL THE DETAILS YOU NEED AHEAD OF HUGE UNDISPUTED HEAVYWEIGHT BOUT