The Blues have been working hard on new ideas to help them go far in the competition, but this was a reminder that the final is a long way off
If Pep Guardiola was "angry" with a routine 3-0 Premier League victory, he will be furious with Manchester City's shock 2-1 defeat to Lyon as they kicked off their Champions League campaign.
Guardiola said at the weekend, following the walkover against Fulham, that he would be going over his side's mistakes - bad passes, extra touches - with them in their team meeting on Sunday.
The Catalan is a control freak and has pulled together an army of staff - coaches, nutritionists, player support officers - to ensure his squad are in the best possible position to perform to their best.