England's leading batsman Ian Bell has been struck on the shoulder at training and was forced to leave the Adelaide Oval nets for treatment.
Bell, who was player of the series in England's Ashes triumph in the UK in August 2013, was hit while facing throw-downs from batting coach Graham Gooch.
Bell does not appear to have suffered a serious injury and is likely to train on Wednesday on the eve of the second Test, according to a London Evening Standard report.
England are determined to improve their batting against the short-ball by facing a barrage of bouncers at training.
It follows their 381-run loss in last month's first Test in Brisbane where Australian quick Mitchell Johnson claimed nine wickets.
Following England No 3 Jonathan Trott's return home with a stress-related illness, Bell is vying with No 6 Joe Root for the vital first-drop role in Adelaide.
Both Bell and Root have said they're keen to do the job.
News of Bell's shoulder concern comes after Australia captain Michael Clarke didn't train on Tuesday because of a sore ankle.
An Australia team spokesman said Clarke, who scored a century in Brisbane, is in no doubt for Thursday's game.
What do you make of the recent crackdown on chucking in cricket?