To replace Ganguly, during the rest of the days of the Test, Yuvraj Singh, the reserve batsman for the ongoing third Test, was seen warming up and twisting his knee which was slightly injured while playing touch football before the second day's play.
According to an Indian team spokesman, Ganguly was taken to hospital for a precautionary "check up".
The southpaw has been battling illness for the past week, and was at one stage considered a doubtful starter for the third Test. But, he managed to convince captain Anil Kumble and took his place in the starting XI, reported The Age.
But, yesterday, he was dismissed for nine to a magnificent Michael Hussey catch in the gully off the bowling of Mitchell Johnson.
Ganguly"s illness will be of most concern, placing even greater importance on the performances of the visiting side"s lower order on the second day.