ESPN

Greatest upsets of past 25 years

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Hasim Rachman-Lennox Lewis

Photograph By AFP/Getty Images

April 22, 2001: Lewis had built a virtually unimpeachable record by the time he faced Rahman in Brakpan, South Africa. So when the 15-to-1 underdog dropped the heavyweight champ for a fifth-round KO, it marked the lowest point of Lewis' career.