Who attempted to become the first world Light-Heavyweight champion in boxing history to win the world's Heavyw?

Who attempted to become the first world Light-Heavyweight champion in boxing history to win the world's Heavyweight championship?|||In 1939, John Henry Lewis tried to become the first Light Heavyweight champion in boxing history to go up in weight and conquer the world's Heavyweight championship when he faced world Heavyweight champion Joe Louis. Joe Louis knocked him out in the first round.