A stunning solo goal from Mathew Leckie has sunk Denmark 1-0 and sent Australia into the World Cup knockout stage for just the second time, where they will face Lionel Messi's Argentina.
Leckie's superb left-footed strike ensured the Socceroos followed the feats of the so-called golden generation in 2006 in reaching the round of 16.
The stalwart, played into space by Riley McGree, broke an hour-long deadlock with a slicing run at his marker Joakim Maehle after gathering some 30m from goal.