Australia have summoned Shaun Marsh to replace injured captain Michael Clarke, who doubts he'll play any further part in the Test series against India.
Clarke was sent for scans after limping from Adelaide Oval on Saturday's final day of play in the first Test against India with a right hamstring injury.
He said scan results were "not fantastic".
Clarke will miss the second test starting in Brisbane on Wednesday and admits he'll struggle to be fit for the third and fourth matches.
And Clarke's latest hamstring injury also threatens his participation in the World Cup, starting February.