Socceroos midfielder Brett Emerton does not believe Australia will struggle physically against Serbia on Wednesday despite being reduced to 10 men in their opening two World Cup matches.

Harry Kewell will serve a one-match ban following his red card against Ghana and Vince Grella (knee) is also unavailable, but Tim Cahill will return after sitting out the draw with Ghana following his dismissal against Germany.

Serbia coach Radomir Antic's main selection poser is how many of his booked players to risk. Defenders Branislav Ivanovic, Nemanja Vidic, Aleksandar Kolarov and Neven Subotic, midfielder Zdravko Kuzmanovic and striker Nikola Zigic are all one yellow card away from a suspension.