The Kiwis were in control in the first half with Nic Woods coolly completing a well worked penalty corner after just two minutes of play.
Despite Australia stepping up the pressure and being awarded three penalty corners, they could not convert. Just before halftime, Daniel Panchia's drag flick sailed into goal to give Kiwis the 2-0 and Auckland's Kim Kingstone added one more in the 41st minute.
"I was pleased with our start, creating a penalty corner that we scored off within the opening minute of play set the tone from the word go. I think we are creating more chances each game and that showed by winning eight penalty corners, seven in the first half alone. We also executed the fundamentals much better, resulting in seven of eight attempts being saved - an area we have struggled with in the two earlier games," said Collins.
The Aussie come-back began in the 51st minute with Andrew Scanlon, Joshua Brethern, Oliver Crane and Max Hendry securing the win.
The Kiwis now have a must win clash against Pakistan at 9pm tonight (NZ time).
"Pakistan present a differently challenge, counter attack hockey that we will need to control. It's a game we need to win to achieve our goal," said Collins.