Ali vs Frazier

The Ali–Frazier trilogy remains the pinnacle of heavyweight boxing, with the 1975 "Thrilla in Manila" widely regarded as the greatest boxing match ever—both fighters were hospitalized afterward. Muhammad Ali's racially charged insults, including calling Joe Frazier a "gorilla" and "Uncle Tom," transcended sport, with Ali representing anti-war and Black Power movements and Frazier symbolizing blue-collar grit. The three fights (1971, 1974, 1975) forged legends, and each man needed the other to achieve that status. Unlike some of the rivalries on this list, this one never had a billion-viewer global audience, but it excels in raw physical toll and cultural resonance — few if any rivalries have produced a match that left both participants hospitalized afterward.