It was an entertaining night of football at the Etihad Stadium as City followed up recent 5-0 wins over Norwich and Arsenal with another feast of goals against the rising stars of the Bundesliga.
But the efforts scored by Nathan Ake, Nordi Mukiele (own goal), Riyad Mahrez, Jack Grealish, Joao Cancelo and Gabriel Jesus were seen by just 38,062 spectators, with City again failing to attract a sizeable crowd for a Champions League fixture.
After the game, Guardiola jovially eluded to the empty seats around the stadium - which equate to around 25% of the stadium's capacity - by inviting more supporters to attend in person, starting with this weekend's game against Southampton.
"I would say the last three games we played here we scored 16 goals," Guardiola told BT Sport. "So I would like to come more people next game on Saturday, we need the people next Saturday. Please.