Andrew Kirkpatrick and Adam Folkard combined to pitch a 1-hitter against USA to lead Australia to the second win of the tournament.
The Australian pitchers faced only 23 batters and fanned 14 to close day three at Hippos Arena.
Australia scored the only run of the game in the bottom of the first inning, on a wild pitch. Hayden Mathews led off with a single through the middle of the field, and James Todhunter followed with a walk.
They advanced with a sac bunt by Nick Shailes and then, with two outs Mathews scored from third on a passed ball.
That was all the support the two pitchers needed. Kirkpatrick had a no-hitter in progress when Head Coach Kere Johanson sent Adam Folkard to the circle.
The big left-hander fanned seven in four innings of work. Folkard pitched the last three innings and also collected seven Ks, with one hit and one walk.
For USA Joel Cooley received the only run of the game, he pitched four episodes with three strikeouts. Mervin Weiler came in relief and fanned three in two innings.
Australia plays Canada for their third game of the tournament at 3:30am AEST.