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Legendary undisputed star advises Oleksandr Usyk's next move amid Jake Paul rumours
Oleksandr Usyk should "retire on top", with fellow undisputed heavyweight legend Lennox Lewis suggesting he could call time soon.
The Ukrainian united all four major heavyweight belts for a second time with a five-round stoppage against Daniel Dubois in July.
Since then, the star has delayed a mandatory order to face Joseph Parker and been linked to a possible MMA clash with Jake Paul.
But now Lewis, the last man to sweep the division before Usyk, has advised 'The Cat' to quit while he is at the sport's summit.
"When a guy retires, it's really down to him," he told Sky Sports News. "He's got to feel that push that he wants to retire.
"But he can teach a lot of young boxers a lot of different things: dedication, hard work, sacrifice, because he's been through that.
"So I would say to him to retire at your own time, but retire on top. Like I did. I think he would have fared really good [in my era too].
"He's doing something Evander Holyfield did [in making the move up from cruiserweight to heavyweight successfully].
"In this era he's beaten all the big guys and all the guys that were in front of him. So he's done a great job."
Lewis was the last undisputed champion in the top division for almost two decades before Usyk defeated Tyson Fury last year.
"It's definitely the hardest thing to do because you basically want to be the best in boxing and take all the belts for yourself," he added.
"[You wnat to] be the number one guy,. There's always other boxers out there that don't want you to achieve that.
"They're standing by, they want to be beat you, they want to be the first boxer to beat you. That's why you've got to make sure that you retire on top."
Usyk's future remains one of boxing's biggest question marks, with suggestions he could trade sports to face Paul in a major clash.
'The Problem Child' faces Gervonta 'Tank' Davis this November in an exhibition bout, but has long been linked to the Ukrainian.
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