If Fury gets past Wilder III then he probably will beat Usyk by KO or TKO well before 12 rounds. The chances of Usyk beating Fury are not high.
It's not high but possible, so many losses their bets here, many thought Usyk chances to beat Joshua is slim but look at what happened, we really can't rule out an upset, Joshua on this fight can't figure out Usyk, he fought an intelligent match, I also thought Joshua has a good ring generalship but look at what happened, there's a possibility of a rematch but it's better if Usyk will go against the winner of Fury - Wilder match.