Australia coach Ange Postecoglou on Monday said captain Mile Jedinak could miss the rest of the Asian Cup group stages after injuring his ankle.

Postecoglou said Jedinak, who will miss Tuesday's game with Oman, was also "not certain" for the Socceroos' final Group A clash with South Korea on Saturday.

The Crystal Palace midfielder did not train with his team-mates at Sydney's Stadium Australia on Monday. He was seen wearing a moonboot brace after Friday's 4-1 win over Kuwait.

"We'll assess it as we go for the Korea game. Obviously it's nothing major that will keep him out for a length of time," Postecoglou told reporters.

He added: "We'll assess it on a daily basis. Mile's pretty keen to play and if he's anywhere near fit he'll play. But at this stage we're taking it day by day."

Jedinak twisted his left ankle late in the first half against Kuwait, when the scores were still level, but he played on and completed the match, scoring a penalty along the way.

Postecoglou also said he planned to make "at least a couple of changes" to his line-up against Oman to keep players fresh for the rest of the tournament.

Friday's thumping win left Australia in the box seat to progress from Group A as they seek to win the Asian Cup for the first time.

"If we're going to play at the tempo we want to, 11 players aren't going to do it so we'll make at least a couple of changes tomorrow night," said the coach.