Manchester City boss Pep Guardiola has ruled out starting Sergio Aguero in Saturday's derby against United despite his goalscoring return to action in the Champions League.
Aguero came off the bench to score City's second goal as they wrapped up their Group C programme with a comfortable 3-0 win over Marseille.
It was only the Argentinian's fifth appearance of the season after being troubled by knee and hamstring issues.
Guardiola has said he will not take risks with the 32-year-old and will not be tempted to throw him in from the beginning at Old Trafford.