By FOX Sports staff
The Socceroos are currently third in their group after picking up five points from their opening six games, but it could have been much worse for them at the ANZ Stadium after they found themselves down by two goals courtesy of an Abdulaziz Al Maqbali strike and an own-goal from Mile Jedinak.
However, Tim Cahill reduced the deficit seven minutes after the break with a trademark header, before a powerful strike from Brett Holman five minutes from time earned the hosts a share of the spoils.
In the end, it proved to be a case of what could have been for Australia given their insipid first-half display, something which Osieck admitted ultimately cost them the win.
"We had a very poor first half and we played too slowly," he said on the AFC's official website. "The penetrating ball never came and we stayed in front of them.
"We knew they [Jordan] would have that shape. There was the goal, which was unnecessary and came from a very poor set-up on our defensive line but that happened and we had some clear stuff [to do] during halftime.
"We had to improve but we had a very unfortunate own-goal, that was unnecessary and again we knew they would play that way. There were three [of our own] players at the near post and Mile was the unlucky one."
Nonetheless, Osieck was pleased with the way the Socceroos clawed themselves back into the game but admits a repeat of Tuesday's display is likely to cost them a ticket to Brazil 2014.
"In the second half at least we could show a lot of spirit and I have to credit our experienced players," the German added. "They changed it around.
"Tim Cahill was a threat throughout and with a bit of luck we could have scored again.
"Look at the table and we are still in the number two position [third now following Oman's 2-1 win over Japan] and that will bring us there [to the World Cup].
"And we have more games to play than the other teams. That can make a difference, and we have two games at home but we can't blow it again.
"A game like [Tuesday's] shouldn't happen again."
Oman boss Paul Le Guen was unable to hide his disappointment after watching his side throw away a two-goal lead, but he hailed the quality of Cahill, who almost singlehandedly dragged Australia back into the game.
"When you are 2-0 up, you hope for more," he said. "You dream.
"But Cahill is one of the best players in the world in the air. He has a great jump and moreover he is a great guy.
"We found it hard to defend against him in the second half."