Helenio Herrera

Helenio Herrera's Inter Milan of the 1960s — Grande Inter — won back-to-back European Cups (1964, 1965) and three Serie A titles using the catenaccio defensive system taken to its tactical extreme. His Inter side conceded just 20 goals in 30 games in their 1964–65 Serie A title winning season. Herrera was the highest paid and most controversial manager in the world in his era, pioneering psychological motivation techniques, team meetings, and tactical discipline that modern managers take for granted.