Title: Four kings
Subjects: History, Boxing, Boxing matches, Boxers (Sports), Biography, SPORTS & RECREATION / History, Sugar Ray Leonard, SPORTS & RECREATION, Boxers (sports), Boxing, history, Sports, united states, Sports, biography
Places: United States
People: Thomas Hearns, Roberto Duran (1951-), Marvin Hagler (1954-), Sugar Ray Leonard (1956-)