Hélio Gracie
Hélio Gracie issued a challenge to a highly touted judoka named Masahiko Kimura. An agreement was made under what would be known as the "Gracie Rules" via the Gracie Challenge that throws and pins would not count towards victory; only submission or loss of consciousness would do so. This played against Judo rules in which Pins and throws can award someone a victory. Kimura would go on to defeat Hélio in 14 minutes. Kimura broke Hélio's arm during the match with a reverse ude-garami after applying a number of submissions. According to Kimura in his book "My Judo", he thought of Hélio Gracie to be a 6th dan judoka at the time of his fight with him in 1951.