The tactical evolution of the game, era by era.
Tomas Rosicky never had the stats to match his reputation, but his reading of space and timing made him Arsenal's biggest-game performer, as Planet Football's look back at his career makes clear.
Roberto Muzzi has revealed he snubbed a move to Arsene Wenger's Arsenal in the 1990s, a decision that enraged Cagliari president Massimo Cellino and reshaped his career path.
Three-man defences have come and gone in waves, from the WM to sweeper systems and the wing-back sides of the 2010s. Each wave solved a different problem.
Catenaccio is often caricatured as pure negativity. Its history is more interesting: a precise set of ideas about marking, cover and counter-attack.
A thread of ideas runs from Ajax in the 1960s through Cruyff's Barcelona to Guardiola's teams. Tracing it shows how football philosophies are passed on and changed.
