Knowing defeat would mean an early exit from the competition, Graham Arnold’s side came out of the blocks full of energy and intent.
Mitchell Duke took advantage of their positive start when he superbly flicked Craig Goodwin’s cross into the far corner to put them 1-0 up after 23 minutes.
That sparked an outburst of jubilant celebration from the small contingent of Australia fans behind the goal, which momentarily silenced the hostile and unwavering support for Tunisia.
They survived a desperate onslaught from Tunisia in the second half, with Youssef Msakni forcing goalkeeper Mathew Ryan into a save at his near post, though that came moments after Mathew Leckie had come inches away from connecting with Goodwin’s cross at the other end.
Stoke City defender Harry Souttar put in a superb performance, making several key blocks and tackles as Australia dug in.
Australia, who suffered a humbling defeat by France in their opening match, will take on tough opponents Denmark next – but with qualification in their own hands. This was a crucial match for both nations given they face competition from defending world champions France and Euro 2020 semi-finalists Denmark to progress from Group D.
It could not have been a better start for Australia then, as they dominated the opening 15 minutes to leave Tunisia unable to get out of their half.
Goodwin’s crosses from the left were initially dealt with, but the ease with which Australia were getting joy down that side will have caused concern for Tunisia.
Eventually, one of those crosses paid off as Duke expertly flicked Goodwin’s delivery into the far corner and ran over to the touchline to receive a clamour of pats on the head from his team-mates.
That goal did little to silence the overwhelming majority of Tunisia fans in the Al Janoub Stadium, though, and it was their side who ended the first half stronger with two big opportunities to equalise.
Australia centre-back Souttar made a crucial, sliding block to deny Mohamed Drager, just minutes before Tunisia captain Msakni volleyed an effort inches wide.
Tunisia changed shape in the second half and put Australia under spells of relentless pressure. Aaron Mooy had to make another vital block, before Souttar yet again intervened to stop a dangerous counter-attack.
The anxiety was palpable in the stadium when Tunisia substitute Wahbi Khazri almost poked in a late equaliser, before six added minutes were signalled by the fourth official.
But Australia – who had to come through two play-offs to qualify for the tournament in Qatar – held on for a significant victory and they go into their final group match with all to play for.
Tunisia, who take on France in their final match, are all but out.
Source – BBC