Masahiko Kimura
The famous vale tudo match between Japanese judoka Masahiko Kimura and Brazilian jiu-jitsu player Hélio Gracie was held at the Maracanã on October 23, 1951. At the time many in Brazil felt that Gracie was unbeatable in martial arts, and that Kimura would not be welcomed back to Japan if he lost the bout. Kimura won via technical submission after breaking Gracie's arm with a "gyaku-ude-garami" hold, which has since become known as a "Kimura lock" in BJJ and mixed martial arts.