Stipe Miocic wants to box Anthony Joshua or Tyson Fury, but not even the greatest UFC heavyweight of all-time is willing to step in the ring with Mike Tyson ... despite Iron Mike being 54 years old.
38-year-old Miocic tells TMZ Sports he's intrigued by a matchup with 32-year-old Fury and 31-year-old Joshua ... the 2 baddest heavyweight fighters in the world.
"I would love [a boxing match w/ Fury or Joshua]. It would be just a different — get out of my comfort zone.