About the series
After Muhammad Ali retired in 1981, the boxing world was ready to crown a new king. At that time, four contenders emerged for the sporting throne, their names forever linked by history. Today they are considered among the greatest boxers of all time: known as the Four Kings — Ray Leonard, Roberto Durán, Thomas Hearns, and Marvin Hagler. These legendary athletes overcame incredible hardships and the toughest obstacles, and their bouts became some of the greatest events in the history of boxing!