They're undefeated after the group phase, but the Hockeyroos still have plenty of room for improvement as the business end of the Olympic Games arrives.
It's a warning side to the team's rivals, with Australia winning five from five to safely progress to Monday's quarter-finals.
The latest victory was a 2-nil triumph over Argentina, two fourth-quarter goals enough to see off one of the pre-Games favourites.
While the Hockeyroos are undefeated, there are no more second chances and they will have to be more ruthless in front of goal to secure a medal.
Saturday's clash was a hard-fought affair, with neither side giving an inch throughout the 60 minutes.
Argentina were superb in defence, but Australia will have concerns about their struggles in the attacking quarter.
The Hockeyroos lacked polish inside the goal circle, multiple attacking raids mounting to little due to sloppy passes or poor turnovers.
Australia failed to draw a single penalty corner throughout the clash, a scenario they will be keen to avoid throughout the knockout rounds.
Gerringong's Grace Stewart sat out the encounter, the 24-year-old rested ahead of the quarter-finals.
Saturday's match was one with plenty of feeling, the Hockeyroos left frustrated by what they felt was poor sportsmanship early in the fourth quarter.
An Argentinian error from the penalty corner had Australia on the counter attack and charging towards their opponents goal, looking to break a nil-all deadlock.
Play was halted, however, when Argentina called for a challenge. It was clearly tactical and the review was quickly dismissed by the video referee.
The scoring opportunity was lost, but the moment spurred the Hockeyroos on, Savannah Fitzpatrick scoring the first goal of the game a minute later.
Emily Chalker then closed out the match with 95 seconds to play, latching on to a loose ball and putting it past the Argentinian goalkeeper.
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