Pat Cummins is in doubt for the day-night Test against the West Indies in Adelaide after struggling to run while fielding in Perth on Sunday.
Cummins felt tightness in his right quad while bowling on Friday in the first Test at Optus Stadium, and he spent the first 36.3 overs of the West Indies' second innings off the field on Saturday.
Australia were hopeful that their attack featuring Josh Hazlewood, Mitchell Starc, Cameron Green and spinner Nathan Lyon would be able to run through the West Indies' line-up without the need for Cummins to re-enter the field.
But a triple-figure opening stand between Kraigg Brathwaite (110) and Tagenarine Chanderpaul (45) resulted in the decision to send Cummins back on the field.
Under MCC rules, Cummins would have been allowed to bowl again from the second hour of play on Sunday.
Nathan Lyon's early heroics on day five meant Cummins wasn't needed in the morning session, with the West Indies slumping from their overnight score of 3-192 to 7-258 by lunch, chasing 498 runs for victory.
The second Test in Adelaide starts on Thursday, giving Cummins just four days to recover from his injury.
Worryingly, the 29-year-old could only run at 60 per cent pace when fielding.
Scott Boland is in the squad and would be the frontrunner to come into the XI if Cummins is ruled out of the second Test.
Steve Smith captained the side while Cummins was off the field in Perth, and would likely assume the role again if the skipper is unavailable for Adelaide.
