Oleksandr Usyk, preparing to do damage to kickboxer Rico Vernhoeven in Egypt this weekend, has questioned the tactics of both Daniel Dubois and Fabio Wardley following their gruelling slugfest.

The 28-year-old Dubois claimed the WBO heavyweight title in the 11th round on May 9 in Manchester, England. The contest has subsequently, and widely, been regarded as one of the best of the current heavyweight era.