Widely regarded as one of the greatest fighters of all time, Muhammad Ali once admitted he believed that even at his very best, he still would have lost to one heavyweight.
Ali was also well known for his antics before fights, including his skills on the microphone. Before his fight vs George Foreman, which is perhaps the most iconic boxing fight of all time, dubbed 'The Rumble in the Jungle', Ali gave his famous rhyming speech in which he told a reporter: "If you think the world was surprised when Nixon resigned, wait till I whup Foreman's behind! I've done something new for this fight. I done wrestled with an alligator, I done tussled with a whale; handcuffed lightning, thrown thunder in jail; only last week, I murdered a rock, injured a stone, hospitalised a brick; I'm so mean I make medicine sick."
Muhammad Ali Full of Praise For Heavyweight Legend
Even in his prime, Ali thinks he would have lost that fight


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Mike Tyson Was Scared & Refused to Fight One Heavyweight
Mike Tyson was scared to fight one heavyweight in particular from his illustrious career.
Tyson was well-renowned for his punching power during his career. Out of his 50 wins, 44 came by way of knockout. He famously knocked out Marvis Frazier in stunning fashion in just 30 seconds. He boasted an incredible record of 37-0 at one point, with many fighters scared to enter the ring with him.
Despite Ali's record of 56 wins and five losses being bettered by many boxers since, many believe the American is still the greatest due to the quality of opponents he beat, many times going into fights as a huge underdog.