Australia suffered a setback ahead of the first Test against India when vice-captain Michael Clarke missed training on Tuesday because of a stomach virus.
Team officials said Clarke, 27, should recover in time for the Test starting on Thursday, but his absence from practice is not what the tourists needed before the four-match series.
All-rounder Shane Watson was forced to sit out of the tour opener in Hyderabad last week with a chest infection, missing valuable match practice.
Australia need a fit Clarke both as an accomplished middle-order batsman and left-arm slow bowler in the absence of better spin options.
Clarke said last week he was looking to make a positive impact in the Bangalore Test, just as he had done on the previous tour four years ago.
"I have had success before in Bangalore and hopefully I can repeat that this time too," Clarke said in Hyderabad.
