Four years ago, Pep Guardiola claimed incoming Leeds United boss Marcelo Bielsa was the 'best coach in the world'.
Throughout their careers, Guardiola has constantly showered the Argentine with praise for his help and guidance in the early stages of his managerial career - especially when he questioned making the transition into management.
In 2006, the Catalan travelled over 5000 miles to speak to Bielsa in Buenos Aires. He wanted to discuss becoming a manager, his ideas and the pressure it brings with someone he had admired for so many years. It was a conversation that convinced him to try his hand in the world of management and the rest, as they say, is history.