Pep Guardiola put Manchester City's Treble down to animalistic support at home that helped humble the best teams in Europe.
City racked up an aggregate score of 16-2 against Arsenal, Bayern Munich, Real Madrid and Liverpool towards the end of last season as they etched their names into legend. Real midfielder Federico Valverde named the Etihad Stadium as the most difficult he has ever played in.
Tuesday night's Champions League game with RB Leipzig is a sell-out again, with City needing a point to secure top spot in Group G.