There were some groans around the Etihad just after the final whistle when it was announced that Manchester City's play-off opponents would likely be either Bayern Munich or Real Madrid.
This path into the last 16 was confirmed minutes later - and it was easy to understand the concerns of City's fans after another nail-biting night, before even that play-off consolation prize was secured.
Their Champions League campaign has been unconvincing, unpredictable and traumatic to the last after they went in at half-time scrambling for survival.
They will be boosted by being able to draft in new signings such as forward Omar Marmoush if they reach the knockout phase, but Guardiola the realist will know City will have to roll themselves back to something like their old selves if they are to reach the last 16.
Holders Real Madrid are showing the usual signs of post-New Year life as Kylian Mbappe settles to his task, while former City captain Vincent Kompany will not return to his old club with his Bayern Munich team in fear if their form this season continues.
City have the talent and capability to beat either opponent, but they must move up several levels – and quickly – if they are to take their Champions League interest beyond the play-off stage.