Even the boxing legend Muhammad Ali has lost in his professional boxing career. He has lost 5 times (1 RTD and 4 Decisions) in his professional career. So, let's take a look at Muhammad Ali's every loss of his boxing career.
Also known as the "Fight of the Century," the legend Muhammad Ali lost for the first time to Joe Frazier via unanimous decision. One of the most shocking days in the history of boxing. Ali then avenged his loss twice against Frazier.
Ali's second professional loss came via a split decision against Ken Norton in their first match. Ali also lost his NABF heavyweight title. However, Ali avenged his loss in a rematch and claimed the NABF heavyweight title once again.
After claiming the WBA, WBC, and The Ring heavyweight titles by defeating George Foreman, Ali had 10 successful title defenses and lost his 11th title defense against Leon Spinks via a split decision. However, Ali avenged his loss in a rematch and reclaimed the WBA and The Ring heavyweight titles.
Ali's fourth professional loss came via RTD (Corner's Stoppage) in his second last professional match against Larry Holmes.
The first time in his career, Ali suffered two consecutive losses, the first time was against Larry Holmes and the second time was against Trevor Berbick via unanimous decision. It was the legend Muhammad Ali's last professional boxing match.