Australia manager Ange Postecoglou believes his side have plenty to prove against dethroned world champions Spain on Monday, despite both sides having already been eliminated from the FIFA World Cup™.

Postecoglou thinks registering the Socceroos' third ever World Cup win would send a message that the young Australian squad can go onto greater things, with the AFC Asian Cup on home soil soon approaching, and at the World Cup in four years time.

"I don't think we've got nothing to play for, I think we've got plenty to play for," said Postecoglou. "I have already said that this is our fourth World Cup and we've only won two World Cup games, so if we are going to make an effort to improve and become the nation we want to become we need to start winning games at this level.

"We've got plenty of motivation, it's far from a dead rubber for us and the fact that we are putting out a young team tomorrow is not because we are trying to experiment, we are putting out the team we think can win the game.

We've got plenty of motivation, it's far from a dead rubber for us.

Ange Postecoglou, Australia manager

"Who is to know which of us will be here in four years time and I don't want to pass us this opportunity to make a mark on the World Cup. We are very, very motivated for tomorrow."

Australia will have to do without their all-time record goalscorer Tim Cahill, who notched two goals in as many games in the competition, as he is suspended, whilst Mark Bresciano and Mark Milligan are injury doubts.

Without the experience of Cahill and Bresciano, Aussie captain Mile Jedinak admitted he will have to take more of a leadership role than ever against Spain. The Crystal Palace midfielder believes they can build on their performances against Chile and the Dutch if they can cut out the defensive errors at key times which have seen them concede three times in both matches so far.

"We got a chance to analyse the games after and it was just moments where a lapse in concentration let us down," said Jedinak. "We know we'll have to stay concentrated and disciplined for the 90 minutes against a quality Spanish team."