The Boomers were extremely disappointing in their opening match in Kayseri, Turkey, needing a series of improbable missed Jordanian shots in the dying seconds and big games from Aleks Maric and David Andersen to prevail 76-75.
After a terrific lead-up to the world titles, coach Brett Brown admits he didn't recognise the dysfunctional outfit that began the tournament and a similar effort against top-ranked Argentina on Sunday (0430 Monday AEST) will result in a heavy defeat.
Advertisement: Story continues below"Against Argentina, we really need to step up," Brown said.
"(Against Jordan) we had no aggression or confidence and we weren't physical.
"We lost our swagger and I need to help get the guys back on track.
"I didn't recognise the team today but there's no better time to bring that back to the table than against the world No.1."
With Turkish president Abdullah Gul in attendance, Jordan jumped a nervous Australian side that appeared to be overcome by the occasion.
Poor shot selection and carelessness with the ball was all the impetus the Jordanians needed to grab a six-point quarter-time lead, which they stretched to seven, 39-32, at halftime.
With the likes of Joe Ingles, Damian Martin, Adam Gibson and Patty Mills all struggling to cope with their world championship debuts, the Boomers could thank Maric and Andersen for keeping them in the contest.
Maric was a dominant presence, finishing with 23 points and nine boards, while Andersen tallied 22 and nine, including 14 points in the first half.
"It was one of those days, it was very scrappy and very disorganised," Andersen said afterwards.
"Basketball's a bit like that, sometimes strange things happen and luckily we came out in front.
"We had a great preparation but maybe it's the jitters, guys getting used to it all and it can be tough at the start of a worlds against a team like Jordan, they've got nothing to lose.
"We played a bit tentative and weren't as aggressive as we needed to be."
Next up is a scary Argentinian outfit that has earned the No.1 ranking after consistently finishing on the podium at Olympic and world championship level over the past decade.
Led by NBA stars Luis Scola and Carlos Delfino, Argentina scraped past Germany 78-74 in their opening match and will try to raise their game against the Boomers.
"I'm very proud of our guys for finding a way to win and we look forward to recovering and playing Argentina," Brown said.
"Obviously it's going to be a very tough game.
"We have to raise the energy level. We're not going to come out and be intimidated."
James Dampney / AAP