Ange Postecoglou issues the Socceroos a licence to thrill against Costa Rica New Socceroos head coach Ange Postecoglou adressed his troops. ANGE Postecoglou has promised to let his Socceroos off the leash tonight, hungry to show against a World Cup opponent thatnational pride is high again. Facing a Costa Rica side that impressed hugely in securing its place at the World Cup, Postecoglou was unapologetic inwants his side to "go for it and, if we fall short, go for it again." With a new formation and new faces in several positions, Postecoglou confirmed players had their World Cup hopes on the line in the first of two games before his squad for Brazil has to be settled. "I had an idea as soon as I got the job about how I wanted the team to play in terms of the set-up and the system, but the core elements are going to be no different to any other team I've coached," Postecoglou said. There's no secret to how I want teams to play and there'll be elements of that in there. Working with players of this calibre, I think I can push them even further than I did others at club level. The game will be possession-based and attacking, proactive, especially here at home. It's not usually in my nature to rein things in. , I'd rather go for it and if we fall short, go for it again. While Lucas Neill is retained to anchor an otherwise inexperienced defence, players boasting 118 caps but 95 of them his,previously on the fringe, such as Mitch Langerak and Rhys Williams, suddenly know they have thea prized firstaudition for a seat on the flight to Brazil. Matthew Leckie looks likely to lead the attack in a 4-2-3-1 line-up, with Robbie Kruse on the right flank and Tommy Oar or Dario Vidosic on the left. Mark Bresciano is set to start, despite facing a potential four-month ban hanging over him. "I've really got two games to get my head around what the squad will be going into the World Cup," Postecoglou said. of the game tonight and another friendly in March. This game is an opportunity to make some of those decisions and find out where we're at. There are guys who I'm pretty certain of what they can do, others who I want to see if they can adapt at this level, and some I hope can fit into the style. Some won't start because they're already in my plans, and there are others I want to form strong opinions of. Our No.1 objective is to win the game, but No.2 is to see certain individuals and how they fit into our system. Mitch Langerak is expected to start in goals for the Socceroos. Postecoglou acknowledged that his defence and goalkeeper would be more green than gold, Neill aside, with Jason Davidson the latest to be tested as a solution to the left-back riddle. "He is a leftback and that's a good start, too often we've tried to manufacture one," Postecoglou said. Both he and Michael Zullo will get an opportunity, as will Ivan [Franjic at rightback]. The whole back four hasn't been settled for quite a while, and we'll have a new goalkeeper tomorrow too. Jason has presented himself well, he's playing in a good league and as a leftback I'd rather spend time with him than try to convert somebody else. Tim Cahill will provide the firepower up front for Ange Postecoglou. Postecoglou also paid tribute to the way Bresciano had trained since learning on Friday that he faces a four-month ban over transfer irregularities, and must weigh up whether to appeal and risk his World Cup participation. "It has affected him in terms of his mind, but it hasn't affected his training, he's been an absolute pro so you wouldn't know," Postecoglou said. But it's not a great situation, and a decision obviously needs to be made [about an appeal] moving forward - being a World Cup year you don't need those things as extra complications. From my perspective the priority has been to see if he's available, and we got the all clear [for this game]. Then post this camp we'll sit down and see what all the ramifications are and if we can deal with it. As of this camp, you wouldn't know he was going through anything as his training has been first class. He's certainly available to play and we expect to see him out there.