Australia secured a 2-0 win Monday in a practice match against Brazilian hosts Parana Clube with Oliver Bozanic and Newcastle Jets striker Adam Taggart on target on his 21st birthday.

But the focus was on an injured Tom Bogic.

Playmaker Bogic went off after appearing to sprain his groin in the early stages and the Australians, in a tough World Cup group containing Chile, Holland and Spain, now have to decide whether to gamble on his fitness.

The Socceroos must trim four men from their Brazilian party and submit their final 23-man squad to FIFA on Tuesday and Rogic is now in doubt after the Melbourne Victory man gave way to James Troisi at the break.

Socceroos assistant coach Tony Vidmar said the coaching staff would make the correct call, while praising Rogic.

"He's certainly for me a very special player; he's young, he's got a lot to learn but he's one of those types of players who in a second can turn a game for you.

"The more game time he has the better he will become," said Vidmar of the 21-year-old former Central Coast Mariners midfielder who joined Melbourne on loan from Celtic in January but has faced repeated questions over his fitness.

Noting several fringe players had faced Parana, he explained: "It was important these guys got some minutes -- they acquitted themselves very well.

As Rogic toiled, there was no place Monday for Josh Kennedy of J-League side Nagoya Grampus after he sprained his back.

"He aggravated his back right at end of training last night -- we decided not to risk it," said Vidmar.

Refusing to speculate on the final 23 he said every player was "fighting for a spot in the final 23" and "it's going to be a very tough decision to make" to trim to the final 23.

Bozanic netted the Roos' opener in Monday's encounter after 18 minutes after running onto a cutback from Dario Vidosic and defender Luke Wilkshire's cross found Taggart at the near post for the second on the half hour.