The boss has revisited his idols in an interview with Premier League Productions, and his background at FC Twente obviously played a huge part in his footballing education, with ex-Netherlands coach Kees Rijvers the biggest influence.
Indeed, all four of the main thinkers he admirers are Dutch, one of them a former United manager in Louis van Gaal. Johan Cruyff, whose brilliant Barcelona side were defeated by the Reds in the 1991 European Cup Winners' Cup final is another, with the man who guided the country to their only major trophy, the 1988 European Championship, Rinus Michels completing the quartet.