Socceroos centre-back Matthew Spiranovic said he and his team-mates will embrace their underdog status at the FIFA World Cup.
Australia are given little hope of progressing out of a Group B consisting of Spain, the Netherlands and Chile, with their tournament opener against the South Americans on Friday in Cuiaba.
Western Sydney Wanderers defender Spiranovic said Ange Postecoglou's squad has gelled in the weeks leading into the Brazil tournament, and give themselves every chance of causing havoc in their group.
"We've been working very hard over the last few weeks to better the understanding amongst us in the defence and midfield in particular," Spiranovic told FIFA.com .
"Against Croatia there were a lot of good signs and I think the defensive structure is pretty good.
"We're going into these games as the underdogs and that's fine by us.
"Within the camp and the group there's still a lot of belief that we could go out there and surprise people.
"It's a young team and there's no fear amongst us. I'm confident we can go out there and surprise them."
Spiranovic said Postecoglou, who only took the national reins in October, has a rapport with several of his squad after linking up with them in their junior years.
Postecoglou has long been in the Australian coaching system, leading Australia's Under-20s side for seven years and worked with other junior rep sides, and Spiranovic said their knowledge of the former Brisbane and Melbourne boss would be invaluable.
"It gives you a bit of a head start if players know the coach well, know what style of football he likes to play and his philosophy," Spiranovic said.
"I played under Ange at the U17 World Cup in Peru (in 2005). It was a great experience, playing on such a big stage at such a young age is a fantastic learning experience.
"It always helps the player-coach relationship if they know each other well, and Ange has known me from a young age and I understand what he expects and requires from players, so that is only an advantage for a coach and a player."
Have you signed up to receive Socceroos Insider – Daily?
Sign up now to receive our daily newsletter, delivered at 12pm AEDT each day, featuring all the best news and videos direct from camp in Vitoria Brazil.
For exclusive Socceroo videos from inside the camp in Brazil, head to http://www.socceroos.com.au/videos
And don't forget to get social with the Socceroos
Aussies Abroad: Milligan triumphs in battle of the Aussies, Jeggo suffers defeat in Austria
There were two Caltex Socceroos in action across Europe on Saturday morning (AEDT) as Mark Milligan and Jimmy Jeggo stepped out for Hibernian and Austria Vienna respectively.... Milligan played the full 90 in Scotland as Hibs overcame Dundee in a 4-2 thriller at Dens Park. AUS
Aussies Abroad: Vukovic injured as Genk exit Europa League
It wasn’t a happy night in the UEFA Europa League for Danny Vukovic as he was stretched off in Genk’s 4-1 loss to Slavia Prague on Friday morning (AEDT). AUSSIES ABROAD: Vukovic features in top-two battle NEW DEAL: In-form Vukovic rewarded with contract extension Still sco
When to watch your Caltex Socceroos this weekend
There's plenty for Caltex Socceroos fans to sink their teeth into this weekend with our homegrown heroes gearing up for some massive matches. Mathew Leckie attempts to slay a giant in Germany, two Aussies set aside national team loyalties in Denmark and Aaron Mooy goes on the
In-form Vukovic earns Genk contract extension
Caltex Socceroos goalkeeper Danny Vukovic has been rewarded for his excellent form with a two-season contract extension at Belgian club KRC Genk. The 33-year-old's deal was due to expire at the end of the campaign but the Pro League leaders have taken up their option to extend