Osieck vows full-throttle action for Socceroos Captaincy material: Socceroos goalkeeper Mark Schwarzer will lead by example. Holger Osieck says there's only one plan for this month's World Cup qualifier against Oman in Sydney - to play full-throttle attacking football and put Australia in the box seat to progress to Brazil. The Socceroos laboured through the first three matches of the final round of qualifying, picking up just two points, and then looked in trouble when they trailed Iraq in Doha, only to secure a dramatic late win. Now Australia sit second in the group behind runaway leaders Japan, and while they are only one point ahead of bottom-placed Jordan, they have a match in hand over the rest of the group. A win over Oman would do wonders for the Socceroos' cause, particularly as their following match, against Japan in Saitama in June, looks a difficult ask. On announcing the squad on Wednesday morning, Osieck was unusually forthright about how he wants the team to play. It is crucial and it is a decisive match. We can't jeopardise anything, we have to go full speed, we have to win it, there can be no ifs and buts and I don't allow any discussions like this," Osieck said. We have to be there and we have to win this game because down the road, that game shows which direction we are going in. Osieck said he couldn't afford to consider the task of winning in Japan just yet because of what was at stake against the Omanis. I don't want to look beyond that game, I just want to be focused on this very game. To me, it's very clear. It's a final, and when you go into a final there's no [distractions]," he said. We put all our efforts into this. We want to be there, we want to win it and we can discuss the stuff that comes later. With skipper Lucas Neill suspended and Brett Emerton dropped, leadership duties will fall to Mark Schwarzer as captain, with Osieck saying "there is not a choice" for the armband. The more experienced and most capped players are always in a leading role. They have to lead by example and Mark Schwarzer, in particular, is a leader," Osieck said. In one bright sign for the domestic competition, Osieck selected six players from the A-League - a far cry from the days of one or two players being selected under Pim Verbeek. "I'm following the A-League very closely and I pay a lot of respect to the A-League," Osieck said. When we had our East Asian qualifying in Hong Kong, we even had a larger squad of A-League players and to have six for a very important qualifier is a very good sign for the league. The transition towards having younger players hasn't been an easy one but the coach feels he's started to see some players evolve into what he's after. "Sometimes you guys [the media] are impatient, sometimes supporters are impatient, but that is my position as a coach and I must know how to develop players," he said. Players have to know how to step up, even when you don't get the support and things don't go your way. You have to bite through. You have to fight your way through. Socceroos squad: Mark Bresciano, Alex Brosque, Tim Cahill, Robert Cornthwaite, Dino Djulbic, Eugene Galekovic, James Holland, Brett Holman, Mile Jedinak, Robbie Kruse, Ryan McGowan, Matt McKay, Mark Milligan, Jade North, Tommy Oar, Tom Rogic, Mathew Ryan, Mark Schwarzer (c), Archie Thompson, Michael Thwaite, Luke Wilkshire, Rhys Williams, Michael Zullo.