Manchester City boss Manuel Pellegrini admits they're being careful with Sergio Aguero's fitness.
Aguero has found the net three times this season, but played only 16 minutes in the Champions League loss at Bayern Munich in midweek.
Pellegrini said: "He is very important. Maybe Sergio in this moment is not ready to play three games in one week (of) 90 minutes.
"That is why I thought it was better for him and the squad not to play 90 minutes against Bayern.
"He is fresh for Sunday (against Chelsea) and I am sure he will make a difference."
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