"The Gypsy King' says the Ukrainian would be a "lamb to the slaughter" against the elite of the division, despite a flawless professional record.
After a few troublesome moments in the early rounds, Usyk dispatched Brit Derek Chisora last month with relative ease, earning a unanimous decision victory against the power-punching veteran.
That win has guaranteed the London 2012 gold medallist a future fight with Anthony Joshua, who reigns as WBO, IBF and WBA heavyweight champion.
