Mike Tyson vs. Michael Spinks

Mike Tyson vs. Michael Spinks, billed as Once and For All, was a professional boxing match which took place on June 27, 1988. Both fighters were undefeated and each had a claim to being the legitimate heavyweight champion. At the time, Tyson held the belts of all three of the major sanctioning organizations (WBA, WBC, and IBF) while Spinks was The Ring and Boxing Illustrated magazine champion, regarded as "The People's Champion," and was considered the lineal champion. The fight was held at the Convention Hall, Atlantic City, New Jersey U.S., it was at the time the richest fight in boxing history, grossing some $70 million, of which Tyson earned a record purse of around $22 million and Spinks $13.5 million. Tyson won the fight, knocking out Spinks in 91 seconds.