Eddie Hearn says Anthony Joshua needs to re-find his focus before Andy Ruiz Jr rematch.
Joshua recently admitted he was disillusioned with the politics of boxing.
The 29-year-old was stopped by Ruiz Jr in a shock defeat in New York on June 1 and will face the Mexican for a second time in Saudi Arabia in December.
Hearn believes the public will see a “nasty” version of Joshua in Ruiz JR rematch.
“I think he's just got to snap out of it,' Hearn said to
Sky Sports. “I think he was disillusioned with the sport because he wanted to fight Deontay Wilder. He couldn't get that fight and as he said in the interview, he didn't really want to fight Andy Ruiz. But tough, you fought him and you fought a real hungry guy. I think the great thing about this promotion is that now, for the first time next week, he looks a man in the eyes who is the only man to beat him as a professional. It's going to be absolutely huge. The whole world will stop to watch this fight."