The four seasons that Josep 'Pep' Guardiola spent in charge of the first team at FC Barcelona saw a period of extraordinary football supremacy delivered through tactical richness, ball retention, and player skill. Indeed, for many, the BarCa side of 2009-2010 is held up as one of the great teams of modern football: a team that played a possession-based game which bamboozled opponents and delighted soccer lovers around the world. Every few months you could observe the team reinventing itself on the blackboard and on the field, constantly striving to improve and dominate the opposition...