The Socceroos had an eight-day camp leading up to the crucial clash, but failed to deliver on the pitch. They now face an uncomfortable challenge to qualify for next year's World Cup in Brazil.

Australia's next match is against Japan at Saitama Stadium on June 4, where they will need at least a point to make sure they remain in control of their own destiny.

Asked if Osieck's position will be reviewed before the Japan game, Gallop said: "No one needs to remind Holger and indeed his staff and indeed the team that they're under pressure."

"We want to qualify for Brazil. We've got three games to come and we need to be making sure we give every effort we can into winning those games."

"The Socceroos have the full support of the FFA, but it goes without saying that we are under pressure to make it to Brazil and the coach and staff know that," Gallop added.

Australia has qualified for the last two World Cups - Germany 2006 and South Africa 2010 - and Gallop is desperate to make it three in a row, though he claimed it wouldn't be "catastrophic" if the Socceroos missed out.

"It wouldn't be catastrophic because the A-League has become the backbone of Australian football, which you couldn't possibly say in years past," Gallop said.

"But we've been to the past two World Cups, we want to go to a third in a row. It's important and we'll be doing everything we can to get there."

Australia are currently level with Oman on six points - that's seven behind group leaders Japan and one behind second-placed Jordan, though the Socceroos do have a game in hand.

The top two teams in each group qualify for Brazil 2014.