India batsman Gautam Gambhir is doubtful for the fourth one-day international against India in Chandigarh on Monday.
Gambhir, 25, injured his groin while batting in the nets on Sunday and is awaiting the results of a MRI scan to determine the extent of the injury.
Should he be ruled out, Sourav Ganguly - who is fit after a hamstring injury - is likely to make his first appearance of the series alongside Sachin Tendulkar at the top of the order.
India are 2-0 down in the seven-match series - the opening game was washed out - and require victory in Chandigarh to keep alive their hopes alive.
Left-arm spinner Murali Kartik is in contention after being called-up to replace out-of-form Ramesh Powar after Friday's 47-run defeat in Hyderabad.
The 31-year-old made the last of his 30 one-day international appearances in February 2006 and has since undergone shoulder surgery.
Kartik could form a two-pronged spin attack alongside Harbhajan Singh, with all-rounder Rohit Sharma the most likely to make way.
Australia captain Ricky Ponting stoked the flames ahead of the fourth instalment of a series that has featured regular verbal exchanges.
Ponting has not been impressed by India's aggressive on-field demeanour and believes actions speak louder than words.
"It seems as though their aggression is more directed at body language and staring and adding a few words," he said.
"Aggressive cricket is being able to play aggressively when you're under pressure.
"We've seen teams, particularly against us in the past, when the pressure really comes on they change the way they play their cricket."