Fast bowler Josh Hazlewood has been ruled out of Australia's two-Test series against Sri Lanka with a back injury.
Hazlewood, who is also vice-captain, has been replaced by Jhye Richardson in the squad for the first Test in Brisbane which begins on Thursday.
"Josh has reported some soreness over the last few days and scans have revealed a very early-stage stress fracture in the same lower-back area as his previous injury from last summer," Australia physiotherapist David Beakley said.
However, Beakley added that the player was expected to be fit for the World Cup in England later this year.
Hazlewood missed Australia's two-Test series against Pakistan in the UAE in September with a similar injury.
Richardson has played seven one-days and seven T20Is, but is yet to make his Test debut.
"Jhye Richardson has had an impressive first half in his Sheffield Shield season and no-one could deny he has now continued that form in ODI matches for Australia. We consider Jhye to be an ideal replacement in the squad for Josh," ICC quoted Australia national selector Trevor Hohns as saying.
The first Test, a day-night game with the pink ball, between Australia and Sri Lanka is slated to be held on January 24 at the Gabba, followed by the second Test in Canberra.
Australia Squad: Tim Paine (C/WK), Joe Burns, Pat Cummins, Marcus Harris, Travis Head, Usman Khawaja, Marnus Labuschagne, Nathan Lyon, Will Pucovski, Matt Renshaw, Jhye Richardson, Mitchell Starc, Peter Siddle