Joe Bugner British and British Commonwealth heavyweight titles and was a three-time European heavyweight champion. He was ranked among the world's top ten heavyweights in the 1970s, fighting such opponents as Muhammad Ali, Joe Frazier, Ron Lyle, Jimmy Ellis, Manuel Ramos, Chuck Wepner, Earnie Shavers, Henry Cooper, Brian London, Mac Foster, Rudie Lubbers, Eduardo Corletti, Jurgen Blin and George Johnson. He fought for the world heavyweight championship in 1975, losing on points in a second bout with Ali. Bugner retired from boxing in 1976, but over the next two decades he made sporadic comebacks with varying success. He moved to Australia in
Heavyweight boxing championship records and statistics single "Heavyweight Champion", is now referred to as the "Undisputed Champion" as the one fighter that has defeated all the other titlists. However, there is no officially declared definition of the term, as major boxing organizations refer to all boxers holding at least two world titles in their respective division as "Unified champions". Some title reigns are not recognized as official reigns due to long periods of inactivity, legitimacy of title, false billing and promotion. In March 1967, Muhammad Ali was systematically denied a boxing license in every state and stripped of his passport because of his refusal to be