Apr. 11, 1956 - Tokyo, Japan - MUHAMMAD ALI or CASSIUS CLAY, as the dominant heavyweight boxer of the 1960s and 1970s, Muhammad Ali won an Olympic gold medal, captured the professional world heavyweight championship on three separate occasions, and successfully defended his title 19 times. The picture shows Ali during a fight in Tokyo, Japan. (Credit Image: © Keystone Press Agency/Keystone USA via ZUMAPRESS.com) Credit: ZUMA Press, Inc./Alamy Live News

- Image ID: G2WENC
Apr. 11, 1956 - Tokyo, Japan - MUHAMMAD ALI or CASSIUS CLAY, as the dominant heavyweight boxer of the 1960s and 1970s, Muhammad Ali won an Olympic gold medal, captured the professional world heavyweight championship on three separate occasions, and successfully defended his title 19 times. The picture shows Ali during a fight in Tokyo, Japan. (Credit Image: © Keystone Press Agency/Keystone USA via ZUMAPRESS.com) Credit: ZUMA Press, Inc./Alamy Live News
ZUMA Press / Alamy Stock Photo
Image ID: G2WENC