Shockwaves Through Sports: 15 Unbelievable Upsets That Redefined History!

Rulon Gardner Defeats Aleksandr Karelin, 2000 Sydney Olympics

At the 2000 Sydney Olympics, American wrestler Rulon Gardner defeated the undefeated Russian Aleksandr Karelin, considered the greatest Greco-Roman wrestler ever. Gardner's win is one of the most remarkable upsets in Olympic history, proving that even the mightiest can fall.