The more football changes the more it stays the same. The managerial rivalries and differences in approach taken to the contemporary game, from the mind-expanding football of Pep Guardiola to the pragmatism of Jose Mourinho, and every other shade in-between, nothing is new. Football's greatest modern-day ideas are simply recycled versions of something which went before. Managerial Rivals delves into five decades of rivalries and looks to draw some familiar sounding parallels to the game we watch today. In part one, we explore the 1950s.