Fury has been hit and dropped relatively easily in the past but the difference is in his insane powers of recuperation. Usyk could certainly time him and drop him but I can’t see him stopping him (unless it’s on a cut). Usyk v Fury is certainly the most intriguing fight at heavyweight now.
After last night, I'm not sure Fury can go back to the 'tippy tappy' version of himself due to age and other factors. Usyk has nowhere near the power of Wilder so Fury could walk straight through him and rough house him. I cannot see either fighter getting knocked out and Fury is far superior in aggression and boxing brain than Joshua so it's likely to be a closer more ugly fight. I can't pick a winner as both of these guys are proven warriors who find a way to win. Draw in an ugly fight or split decision towards Fury given home advantage and being the more marketable fighter.
To be fair Steve Cunningham caused Fury no end of problems in their fight years ago but Fury clearly has come on leaps and bounds since then. Usyk is de facto number two in the division if he beats Joshua but I don’t see him troubling Fury unless Fury doesn’t take the fight seriously.
As I've said since Usyk beat Gassiev- Usyk is a different level to any of the HWs and will become unified champion.