Keeping a clean sheet in Adelaide could be the most important factor for the Socceroos if they are to beat Saudi Arabia in their World Cup qualifier on Thursday.
Australia's three wins in the third phase of qualifying in the Asian Football Confederation have all come when Ange Postecoglou's men have kept their opponents scoreless.
The Socceroos started Group B with a 2-0 win over Iraq and a 1-0 triumph away to United Arab Emirates.
Four straight draws - none of them scoreless - followed but they got back on track with a 2-0 win over the UAE in Sydney in March.
Saudi Arabia have scored in every game they've played in this phase but the Socceroos have only conceded in two of their past nine World Cup qualifiers on home soil.
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A win for the home side would take them at least level on points with Saudi Arabia in Group B, while a two-goal margin would move Australia into the automatic qualifying berths for Russia 2018 with two games remaining.
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