Australia vice-captain Ricky Ponting, who made a century in each of the first three Tests against the West Indies, is doubtful for the fourth because of illness.
"He has a viral infection and I think if the match began tommorrow (Thursday), he wouldn't be able to play," said Australia captain Steve Waugh.
Ponting missed the most of the final day of the third Test on Monday for the same reason. He made 117 and 42 not out in the first Test, 206 and 45 in the second and 113 in the third Test.
Australia are 3-0 up in the series and have a chance to become the first team to achieve a whitewash in the Caribbean if they win the final Test starting in Antigua on Friday.
