Ali vs Frazier III. Considered to be the greatest boxing bout of all time, Ali defeats his nemesis Frazier in their rubber match via 14th round TKO when Frazier does not answer the bell for the 15th after a grueling war.Scorecards after 14 rounds.9-4-1 Ali.8-4-2 Ali. 9-3-2 Ali (Ali wins via TKO).li vs Frazier III. Considered to be the greatest boxing bout of all time, Ali defeats his nemesis Frazier in their rubber match via 14th round TKO when Frazier does not answer the bell for the 15th after a grueling war.