Evander Holyfield says he will be fighting for glory and not money when he returns to the ring on 20 December.
Holyfield faces Russia's WBA champion Nikolai Valuev in Zurich, Switzerland aiming to become the oldest heavyweight title-holder in history.
And the 46-year-old claims he wants to go on and become the undisputed king of the heavyweight division.
"My goal is to be undisputed champion and not just to win the one title," said Holyfield.
"I think people make too much about age. I haven't fought in a year but I will be ready."
"I have taken care of myself and if I couldn't fight then I wouldn't fight"
He had his license to box in the state of New York revoked three years ago and had to undergo five hours of tests in Germany to prove he was healthy enough to fight.
"I have taken care of myself and if I couldn't fight then I wouldn't fight," said Holyfield.
Fellow American George Foreman was 45 when he knocked out Michael Moorer in 1994 to win the IBF and WBA crowns.
Holyfield will be a massive underdog against Valuev, who is more than 100 pounds heavier and stands a towering 7ft tall.
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"If it was not a championship fight we would not have taken it," Sanders said.
Since 2001, he has won only five of 11 fights. He currently holds a 49-9-2 career record.
Valuev, 35, who has a record of 49 wins, one defeat and 34 knockouts, currently holds the WBA belt while the Klitschko brothers currently hold four other versions of the heavyweight title.
Vitali Klitschko, 37, has the WBC belt, while his 32-year-old brother Wladimir holds the IBF, WBO and IBO versions.
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