The Biggest Upsets in BOXING History | pt. 1-4

The Biggest Upsets in BOXING History — unforgettable moments when underdogs surprised the boxing world, favorites fell short, and unexpected victories became part of boxing history. This video brings together some of the most surprising defeats, memorable knockouts, and unexpected victories from professional boxing. Parts 1–4 feature legendary fights that changed careers, defied expectations, and reminded us that anything can happen once the bell rings.