Evander Holyfield has challenged the Klitschko brothers to take the opportunity to "probably make the biggest payday of their lives" by fighting him.
The American heavyweight may now be 49 but he has no interest in hanging up the gloves just yet, instead calling out the two biggest names in the division.
Holyfield has not been in action since stopping Brian Nielsen in Denmark last May, the result giving him a 44th victory in 57 professional fights.
However 'The Real Deal' - a bronze medal winner in the light-heavyweight division at the 1984 Olympics - insists Vitali and Wladimir shouldn't overlook him just because of his age.
"Age ain't nothing but a number," Holyfield told Sky Sports.
"They (the Klitschkos) have got an opportunity to probably make the biggest payday of their lives fighting Evander Holyfield.
"They are telling everyone that they respect me, and that they don't want to beat me up.
"But I fought George Foreman, I fought Larry Holmes, and I said the same thing. I said that I wouldn't get any credibility from beating someone older.
"They said 'but, we are going to get you 20 million, what do you think?'. I said make sure that guy wants to fight me, because I don't want it to look like I fought that older guy, but that he fought me.
"With the Klitschkos, they aren't choosing to fight me, I've said I'll fight them.
"All they got to do is realise that both of us will make money, then we'll see who the winner is."
WBC champion Vitali is scheduled to take on unbeaten German Manuel Charr in Moscow next month while Wladimir recently defended his IBF, IBO, WBA and WBO titles against Tony Thompson, stopping the American in the sixth round.
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