Manchester United manager Jose Mourinho and his Manchester City adversary Pep Guardiola rekindle a rivalry 20 years in the making in Saturday's hotly anticipated derby. Friends who became foes, Mourinho and Guardiola represent opposite ends of football's ideological spectrum and their ongoing grudge match has shaped the game's recent history. It is three years since they last shared a touchline and tomorrow's clash at Old Trafford marks the resumption of a duel that could determine the outcome of the Premier League title race. "[Guardiola] left Barcelona for a number of reasons," former Liverpool defender Jamie Carragher wrote in the Daily Mail when Mourinho was appointed by United in May. "But one of them, I'm sure, is the continual baiting to which he was subjected by Mourinho in the media. "Guardiola must be thinking: 'Oh no, not him again'." The pragmatic Mourinho, 53, and the idealistic Guardiola, 45, have both shown a capacity for ruthlessness in their early days in Manchester...

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