The star forward may have to skip the trip to South America due to a knock picked up playing alongside David Carney in his international team-mate's New York Red Bulls debut
Socceroos attacker Tim Cahill has conceded he may not play in Australia's friendly international in Brazil on Saturday after suffering an ankle injury playing for New York Red Bulls.
Cahill was substituted in the 58th minute of the Red Bulls' 2-1 home win over DC United after rolling his right ankle, following a tackle from visiting defender Dejan Jakovic in the first half.
Jakovic slid into Cahill in the lead-up to Lloyd Sam's opening goal for New York after seven minutes and although the 33-year-old Australian played on to score the eventual winner in the 38th minute, he admitted he may struggle to make the trip to Brasilia to play Brazil on September 7.
"I might be travelling to Brazil and I'll have to see what happens," Cahill told soccerbyives.net after the match.
"Shocking tackle but there's nothing I can do about it."
Football Federation Australia is yet to confirm whether Cahill will travel to Brazil and tweeted 'no news at this stage' on Monday, regarding the veteran's potential injury.
Cahill's goal against DC United, one of his trademark headers, gave the Red Bulls their first win in four games, while it was the Socceroos attacker's eighth strike of the Major League Soccer (MLS) season.
The former Everton attacking midfielder also played a role in Sam's opener as he released the 28-year-old English midfielder on the right-hand side of the box, before the former Leeds United and Notts County man delicately chipped DC United goalkeeper Bill Hamid.
New York held on for victory despite a 73rd-minute red card to Ugandan defender Ibrahim Sekagya.
Australian left-back David Carney, who signed for the Red Bulls last month after a long hiatus from professional football, made his debut for the club and showed signs of rustiness, at fault for the equaliser in the 36th minute.
Carney played his first professional club game since August 18, 2012, when he started against DC United and the 29-year-old was thrilled with the atmosphere at Red Bull Arena after he managed a full 90 minutes.
"It's fantastic, it was better than I thought," Carney said.
"Timmy said that the fans were great, you get a lot of full houses, they were singing the whole way through, so it was fantastic.
"We need their support coming into the end of the season."
Carney also claimed he was impressed by the standard of play in his first MLS appearance.
"I feel like it was a bit like international football," Carney said.
"It's a bit slow but obviously it's technical, you've got to keep (the ball) in certain places.
"I actually felt that the standard's better than I thought."