The 24-year-old has been absent since the title holders' first game of the season after hurting his knee but it is unclear whether he will reach his target of a Saturday comeback
The league champions have published a series of photographs on their official website that show the Argentina international in training with the club's fitness coach at Carrington training ground.
The 24-year-old, who last season won the title for the blues with a dramatic last minute goal against QPR on the final day, has been out of action since August 19 when he sustained the injury in the 3-2 win over Southampton.
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City had expressed their optimism that the player would be fit by mid-September following scans on his knee and the pictures, which show Aguero taking part in stretching and running exercises.