Oleksandr Usyk (left) has reigned as the undisputed champion at cruiserweight and heavyweight
Unified heavyweight champion Oleksandr Usyk believes Anthony Joshua will beat Tyson Fury and has been helping him come up with a gameplan for the all-British contest.
Joshua returns to the ring on 25 July to face Kristian Prenga in Riyadh, Saudi Arabia, and has signed a deal to fight long-term rival Fury later in the year.
The 36-year-old has been training with former opponent Usyk in recent months, spending time with the two-time undisputed heavyweight champion in Spain and Ukraine.
Undefeated Usyk, who has beaten both Joshua and Fury on two occasions, told BBC Sport: "In my opinion AJ wins against Fury.
