Probably a good idea for Oleksandr Usyk to not vacate the IBF title and fight Filip Hrgovic. After all, Fury is unstable and keeps on retiring, setting unrealistic deadlines and backing out of fights, so there is no guarantee he will fight Usyk next year. If Usyk vacates, it will be Hrgovic vs the highest ranked heavyweight available for the title. Andy Ruiz Jr is the IBF highest ranked heavyweight after Hrgovic. The next highest are Joshua, Wilder and Bakole, all of whom would make for interesting fights with Hrgovic.