Charles Martin is desperate to fight and knock out Anthony Joshua before he retires, sensationally says his manager.
Martin, 35, is 5-1 since surrendering the IBF world heavyweight title to Joshua back in April 2016.
'AJ' would go onto defend the IBF championship and collect other world heavyweight titles before regaining his belts against Andy Ruiz Jr.
But Martins' manager Mike Borao doesn't like his chances in the rematch against the undefeated Ukrainian.
He also revealed that his fighter is hellbent on running it back with Joshua and wants to knock him out before he eventually calls time on his career.
"I think Usyk beats Joshua again, but I am rooting for Joshua," he told Sky Sports.
"Charles desperately wants to fight and KO Joshua before he retires. He's been focused on that singular goal since 2016 - it's what motivates him and it's the reason why he will beat Luiz Ortiz.
"Charles will do whatever it takes to become two-time heavyweight champion, including fighting a second IBF eliminator against one of the most avoided heavyweights in the world."
Martin hasn't fought since stopping Gerald Washington, with his manager claiming Andy Ruiz Jr and Dillian Whyte have turned down fights against him.
Borao added: "Charles instructed me to match him against the only fighter to KO Joshua, Andy Ruiz. I tried very hard to make a fight against Andy, but he refused.
"We also tried to make the fight against Dillian with no success - and thank goodness, given his most recent withdrawal [from the Otto Wallin fight due to injury]."
Martin will return to action on January 1 when he faces perennial contender Luis Ortiz.
And, as for Joshua, he's set to rematch Usyk in the first quarter of 2022.
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