As unofficial biographer of all three players, popular sports journalist Luca Caioli has researched these superstars extensively, gaining exclusive insights from their friends, families, teammates and managers - including some of the biggest names in football - to put together a revealing picture of their greatly differing characters and their unique contributions to the game. He now brings their stories together in an attempt to understand exactly what makes them great and how such different characters have each harnessed their potential to reach the very top of the game.