Australia inflicts a painful 1:0 defeat to Tunisia in their second group game at the Al Janoub Stadium.
Australia have lightened their chances of qualifying from the group stage after their opening defeat to France, after securing their first victory in the World Cup 12-years.
Australia will meet Denmark in their final group game and are hopeful of silencing the Danes to qualify to the round 16.
Tunisia risk exiting the World Cup after gaining just a point in two games, with their last clash against reigning champions France promising to be a difficult one.
Mohammed Drager saw Ryan Mathew out of his line on the 21st minute but shot high over the bar.
Mitchell Duke headed home beyond the reach of Aymen Damhen from a deflected cross from Craig Goodwin in the 23rd minute to hand Australia the lead.
The Australians blocked Youssef Msakni's shot from the edge of the 18-yard box to prevent Tunisia from equalising with seven minutes to end the first half.
Mitchell Duke leaped high to head at goal but Aymen Dahmen brilliantly saved it on the 44th minute.
Youssef Msakni's shot missed the right post by inches from Issam Jebali's pass inside the box.
Australia went on the break ahead of Tunisia after Mitchell Duke got the opener.
Unlucky Youssef Msakni's hit a shot at goal from just at the edge of the box but Australia cleared the ball away to avert the threat.
Youssef Msakni's forces Mathew Ryan to a great save at the left post to deny Tunisia the equaliser on the 72nd minute.
Aaron Mooy dribbled past a defender before sending the ball high over the bar.
Mathew Ryan denied Wahbi Khazri's brilliant low drive into the post with two minutes to go.
Tunisia failed to register their first goal at the mundial to lose to Australia in Al Wakrah.
By: Iddriss Abdul Rahim