The American Jarrell Miller remains highly ranked, while compatriots Jared Anderson and Richard Torrez Jr., the Olympic silver medalist, are rebuilding.
New Zealand’s former world champion Joseph Parker is looking to make a comeback after serving a provisional doping ban in August.
Australia’s Teremoana Teremoana has stopped all 12 of her professional opponents over two rounds, while Uzbekistan’s two-time Olympic champion Bahodir Jalolov extended his unbeaten record by defeating Solomon Dacres on Saturday.
In Britain, Derek Chisora, 42, is considering another comeback and says he expects to face WBA “regular” champion Gasiyev in December.
British champion Richard Riakporhe is chasing world honors after moving up from cruiserweight, while former cruiserweight world champion Lawrence Okolie is targeting a comeback after settling with the WBC over a negative drug test finding.
David Adeleye, Dave Allen, Johnny Fisher and Frazer Clarke remain on the domestic scene, while Leo Atang (19) and Ireland’s Adam Olaniyan (20) are new talents.
As Usyk, Fury and Joshua approach the end of their careers, the heavyweight division is entering a new era.
There’s no shortage of potential big fights, but getting the champions together before mandatory commitments, rematches and boxing politics are introduced could prove the biggest challenge.