A toe injury has forced defender Bailey Wright out of the Socceroos squad for the World Cup qualifiers against Iraq and the United Arab Emirates.
Coach Ange Postecoglou ruled England-based Wright out on Sunday, calling in Perth Glory's Josh Risdon to replace him.
"Bailey has a minor injury that he has been nursing and although he played for Preston overnight we thought it better for him to stay in the UK," Postecoglou said.
"We have two tough matches in quick succession and will need everyone ready to go."
Risdon was to join his Socceroos teammates who began assembling in camp in Perth on Sunday ahead of the match against Iraq at NIB Stadium on Thursday and the clash with the UAE in Abu Dhabi on Tuesday week.
"Josh Risdon has come into the group recently and equipped himself well and I have no doubt that he will do a job if required over the next two matches," said Postecoglou.