Exclusive: Lennox Lewis makes bold Tyson Fury retirement claim and names 'biggest fight' if he loses to Oleksandr Usyk
Usyk beat Fury via split decision in their first meeting back in May, becoming the first undisputed heavyweight champion since Lewis achieved the feat in 1999. Usyk retains the WBA, WBC and WBO belts but is no longer undisputed champion, with British fighter Daniel Dubois currently in possession of the IBF strap.