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BBC Sport unpacks one of football’s most dramatic managerial rivalries, which came to a head when Pep Guardiola’s Barcelona took on Jose Mourinho’s Real Madrid in the 2011 Champions League semi-final.
One-time friends, Guardiola and Mourinho clashed in their pre-match news conferences, and a fierce match followed.
Watch Pep Guardiola: Chasing Perfection on BBC iPlayer and you can delve deeper with an accompanying four-part podcast series on BBC Sounds – ‘Sporting Giants’.