Lionel Messi (right) of Argentina and Aziz Behich of Australia compete for the ball in their World Cup round-of-16 match on December 3, 2022 in Doha, Qatar. Photo: VCG

Lionel Messi produced a moment of trademark quality to score the opener in a 2-1 win over Australia and help send Argentina into the quarterfinals of the World Cup on Saturday.  

Messi's 789th goal in his 1,000th career appearance - but first in the knockout rounds of the World Cup - helped set up a last-eight clash with the unbeaten Netherlands on Friday.

Julian Alvarez scored the other in the 57th minute after some calamitous Australian defending, before Enzo Fernandez's 77th-minute deflected own goal set up an unexpectedly nervy finale.

Argentina's players celebrated wildly in front of their massed ranks of fans and man of the match Messi paid tribute to them for dragging the team across the line.

"Amazing feelings and I am really happy to share these beautiful and happy moments with them all," said the 35-year-old, who is trying to win the World Cup for the first time in what will surely be his last attempt.

"I know the effort they are making to be here with us and I know how much they ­enjoyed it.

"There is a bond we have - it is something beautiful; it is what the national team should be."

Messi's classy first-half goal broke the resistance and ultimately the hearts of a gutsy Australian side who defied all expectations in Qatar and went down fighting.

Australia's yellow-shirted fans were vastly outnumbered among the packed crowd at the Ahmad bin Ali Stadium and were drowned out by Argentina's boisterous and bouncing supporters.

The Socceroos were huge underdogs but this has been a World Cup of shocks. 

Two-time champions Argentina were the victim of arguably the biggest shock in Qatar when they went down 2-1 to Saudi Arabia in their opening match. 

Argentina had Australia pinned back but coach Graham Arnold's men were resolute and growing in confidence as an uninspiring first half wore on.

Argentina badly needed something special and in Messi they got it 10 minutes from the break.

Alexis Mac Allister fed defender Nicolas Otamendi - still in the box for a free kick - and he miscontrolled it into the path of Messi who bent the ball left-footed along the ground into the corner.

Australia had only got this far once before, in 2006, and they needed to attack in the second half. 

Instead, they self-destructed. Goalkeeper and captain Mathew Ryan tried to play out under fierce pressure in his box from hard-running Rodrigo de Paul just before the hour and was dispossessed by Alvarez.

The Manchester City striker, 22, nipped in, stole the ball from Ryan and swiveled to slot into an empty net for his second goal in as many games.

The Socceroos looked dead and buried but substitute Craig Goodwin latched onto a loose clearance and his shot hit Fernandez and ricocheted in with 13 minutes left.

Both sides had chances in the last 10 minutes, the last falling to Australian teenager Garang Kuol deep in injury time, but goalkeeper Emiliano Martinez made a desperate save.