Haaland was part of the squad who travelled to Madrid but did not get off the bench, seemingly still feeling the knee injury he suffered against Newcastle last week.
Guardiola confirmed Akanji underwent surgery on an abductor injury and initial reports suggested the Swiss international was likely to have been ruled out for the rest of the season.
Bobb did return to City training earlier this year but is said to have suffered a fresh setback since and his return date remains unclear.
The striker came off against Newcastle and while Guardiola suggested Haaland’s injury was not serious, he did not feature at all despite making the squad.
Fellow defender Manuel Akanji suffered an injury during the first leg of the Madrid tie, a dramatic late 3-2 defeat at the Etihad Stadium.
