Matthew Wade and Mitch Marsh are waiting in the wings as Australia seek fitness updates on Usman Khawaja and Marcus Stoinis.
Faf du Plessis is unsure of his ODI future but says it will be hard to walk away after his century against Australia.
South Africa fans must have been wondering why it took them so long to show what they are capable of at the Cricket World Cup.
Australia will play England in the Cricket World Cup semi-finals and may be missing Usman Khawaja, while Marcus Stoinis will be assessed.
Faf du Plessis made South Africa's first century of the World Cup but they almost failed to defend a target of 326 against Australia.
South Africa captain Faf du Plessis could take little joy from a big win over Sri Lanka, having already been knocked out of the World Cup.
Sri Lanka's chances of making the last four at the Cricket World Cup reduced considerably as they were swept aside by South Africa.
South Africa captain Faf du Plessis acknowledged the Proteas' batting order has struggled for confidence at the Cricket World Cup.
New Zealand captain Kane Williamson was relieved and thankful to Colin de Grandhomme after victory over South Africa at the World Cup.
South Africa have lost three matches already and only a stunning run of wins will spare them from Cricket World Cup elimination.