Australia lifted the inaugural Cup of Nations on Wednesday night in Melbourne after going through the tournament undefeated and conceding just a single goal.

However, the 3-0 scoreline against Argentina at AAMI Park didn't reflect the closeness of the match between the world no.6 and no.36 nations.

Argentina challenged the Matildas throughout the game and if they were a team who had more international experience under their belt, it could have been a different result.

Milicic made a host of changes to the squad which beat the Korea Republic 4-1 in Brisbane while central defender Laura Alleway was forced from the field with an ankle injury early on, leaving the Matildas with a make-shift defence.

Taken by Stephanie Meek (@stephaniemeekphotography)

"I thought we were sluggish from the start but very slow in our build-ups, slow in shifting the ball and moving the opposition," Milicic said.

"We weren't decisive in our passing and our decisions, probably need to work on our positioning higher up the pitch.

"I think at the same time we were a little bit naive as well, we played a game I think they were after, so disappointed in a couple of areas but overall I'm pleased how the last 10 days have gone."

It's been rollercoaster three months for the Matildas and those involved with the squad since the abrupt sacking of Alen Stajcic in January, just five months out from their opening World Cup match.

Milicic, who was only appointed as the interim head coach on February 18, took his first training session five days before the Cup of Nations begun with the round-robin tournament used to help him and the Matildas begin their World Cup preparations.

"We just want to provide an environment where these girls have the best possible chance to go as deep in that World Cup tournament as possible," he said.