Great rivalries are always more about feel than about numbers. There have been only four Premier League seasons in which Manchester City and Liverpool have finished in the top two positions in the table (and one of those occasions was 2013-14 when the managers were Manuel Pellegrini and Brendan Rodgers, which is not a duel anybody is writing books or making documentaries about).
Yet for most of the decade that Pep Guardiola has been at City, it has felt that English football was defined by his struggle with Jürgen Klopp and Liverpool, and by a form of the game that developed as each learned from the other.
