BBC Sport looks back at how manager Pep Guardiola’s fresh tactics led to Barcelona’s historic 6-2 win over rivals Real Madrid in 2009, during his first season in charge of Barca.
Guardiola’s Manchester City side face Real in the Champions League quarter-final second leg on Wednesday.
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’.
Available to UK users only.
