Reigning European champions Bayern Munich struck first at the Etihad, with Franck Ribery beating Manchester City goalkeeper Joe Hart, all too easily, with a dipping shot from outside the box.
It will go down as yet another error from Hart, and another blow to the England goalkeeper's reputation. There was more to come.
After Thomas Muller had doubled Bayern's lead, Hart was beaten at his near post, again, by Arjen Robben.
Not a great day at the office.