Evander Holyfield has claimed that he could beat both of the Klitschko brothers.

Wladimir and Vitaly hold the IBF, WBO, WBA and WBC heavyweight crowns respectively, but the 49-year-old Holyfield believes he is more than a match for both Ukrainians and called them out in an interview with L'Equipe.

"For both [Klitschkos] it's is only about where they can get the biggest purse. Well they won't get the biggest purse against second rate boxers, but against me, because I am the best known active heavyweight boxer," said Holyfield.

"I want to retire as heavyweight champion of all federations. I could beat them both."

Holyfield is slated to fight in Brazil in December against a currently unnamed opponent.