The Socceroos have defied the odds, advancing to the last 16 at the FIFA World Cup with an upset win over Denmark (1-0) in their final group stage match.

Veteran winger Matthew Leckie scored the winner in the 60th minute to ensure Australia progressed to the knockout stage.

The Socceroos now have a date with powerhouse Argentina at 6am on Sunday (Melbourne time).

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It is the first time the Socceroos have won two matches at a World Cup tournament.

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Image: Shaun Botterill – FIFA/FIFA via Getty Images

World Cup: Socceroos through to knockout stages after epic upset