Australia's defeat to the United States may have slowed their World Cup momentum, but head coach Tony Popovic remains convinced his controversial team selection was the right decision.

The Socceroos suffered a disappointing 2-0 loss against the tournament hosts, a result that leaves their qualification hopes hanging in the balance heading into a decisive final group-stage clash against Paraguay.

Yet rather than second-guessing his decisions, Popovic believes he may not have rotated his squad enough.

Surprise Changes Before Kick-Off

Ahead of the match, many supporters were surprised to see Matthew Leckie and Nishan Velupillay handed starting roles.

The decision came at the expense of Nestory Irankunda and Connor Metcalfe, the two players who had scored in Australia's impressive opening victory over Turkey.

It was a bold call from Popovic, particularly considering the importance of the encounter against an in-form American side.

However, the Australian manager explained that freshness was a key factor behind the changes.

"We didn't want to use exactly the same starting eleven," Popovic said after the match.

"In fact, after what we saw, perhaps we should have made even more changes."

The coach revealed that the physical demands of facing the United States had influenced his thinking.

"We knew how intense the game would be and how much athletic power the Americans possess. We wanted fresh legs in wide areas and hoped our explosive players could have a bigger impact later in the match."

A First Half Australia Could Not Recover From

Unfortunately for the Socceroos, the plan never fully materialised.

The United States dominated the opening period, winning battles across the pitch and preventing Australia from finding any rhythm.

Popovic admitted his side struggled from the opening whistle.

"We were second to almost every ball," he said.

"We couldn't regain momentum and allowed them to control the game."

The coach was particularly frustrated by the manner of the goals conceded.

"We gave away a couple of soft goals and looked flat in the first half. That made the task much harder."

By halftime, Australia found themselves chasing the game against a confident American side backed by a passionate home crowd.

Irankunda and Volpato Spark Improvement

Recognising the need for change, Popovic turned to his bench at the interval.

Irankunda and Metcalfe were introduced immediately, bringing fresh energy and urgency to the attack.

The impact was visible.

Australia played with greater intensity, pressed higher up the pitch and began creating more opportunities.

Cristian Volpato also impressed on his competitive debut, showcasing his technical ability and creativity in wide areas.

Meanwhile, experienced midfielder Jackson Irvine provided leadership and intelligent runs from deep positions.

Although the breakthrough never arrived, Popovic was encouraged by the response.

"The players who came on made a really positive impact," he said.

"They helped raise the tempo and improved our overall quality."

Positives Despite Defeat

While the final result was disappointing, the second-half display gave Australia reasons for optimism.

The Socceroos were far more aggressive, spent longer periods in attacking areas and frequently forced the United States onto the back foot.

Popovic was keen to highlight that improvement.

"It is easy to focus only on the substitutes," he explained.

"But the players who started the match also responded well after halftime."

"They showed character, reacted to the difficult first half and played with much greater intensity."

The coach believes that attitude could prove crucial in the decisive match ahead.

All Eyes on Paraguay

Despite the setback, Australia's World Cup destiny remains firmly in their own hands.

The Socceroos still sit on three points and know that a positive result against Paraguay could be enough to secure a place in the Round of 32.

The final group match now takes on enormous significance.

For Popovic and his players, the challenge is clear.

Forget the disappointment against the United States.

Build on the encouraging signs from the second half.

And deliver one more strong performance when it matters most.

Because Australia's World Cup dream is still very much alive.

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