Kim Duk-koo (Hangul:; born Lee Deokgu, Hangul: ; July 29, 1955 November 18, 1982) was a South Korean boxer who died after fighting in a world championship boxing match against Ray Mancini. His death sparked reforms aimed at better protecting the health of fighters, including reducing the number of rounds in championship bouts from 15 to 12.

Ray Mancini (born Raymond Michael Mancino; March 4, 1961), best known as "Boom Boom" Mancini, is an American former professional boxer who competed professionally from 1979 to 1992 and who has since worked as an actor and sports commentator. He held the WBA lightweight title from 1982 to 1984. Mancini inherited his nickname from his father, boxer Lenny Mancini. In 2015, Ray was inducted into the International Boxing Hall of Fame.