DAN GELSTON, The Associated Press
PHILADELPHIA (AP) — Joe Frazier had to throw his greatest punch to knock down "The Greatest."
A vicious left hook from Frazier put Muhammad Ali on the canvas in the 15th round in March 1971 when he became the first man to beat him in the Fight of the Century at Madison Square Garden.
"That was the greatest thing that ever happened in my life," Frazier said.
It was his biggest night, one that would never come again.
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