Oleksandr Usyk next fight: Heavyweight unification unlikely; Anthony Joshua expected to invoke rematch clause | CBS Sports Headlines Oleksandr Usyk next fight: Heavyweight unification unlikely; Anthony Joshua expected to invoke rematch clause The new champion threw quite the wrench into any possible four-belt unifications in the near future ESN FeedsThis … Continue reading Oleksandr Usyk next fight: Heavyweight unification unlikely; Anthony Joshua expected to invoke rematch clause