Cameron Green joins double centurion David Warner in retiring hurt on day two of the Boxing Day Test at the MCG.
Warner became the second man, after England's Joe Root, to score a double century in his 100th Test, going off immediately after reaching the milestone with cramping and heat exhaustion.
Green, meanwhile, was hit on the right index finger while batting. The finger was bloody and swollen as he left the field late in the day, casting doubt on his ability to bowl in the second innings and back up his maiden five-wicket haul from the first innings.