Mike Tyson vs. Michael Spinks was a boxing match which took place on Monday June 27, 1988. Both men 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 (World Boxing Council, World Boxing Association, and International Boxing Federation) while Spinks was the Ring and Boxing Illustrated magazine champion, regarded as “The People’s Champion,” and was considered the lineal champion. 91 Seconds.   Source: Wikipedia, Youtube