Aiming to win their first ever World Cup knockout, the Proteas bowlers removed both openers inside the first five overs against Sri Lanka.
Australia's victory in Sydney was fired by a spectacular maiden one-day international century from Glenn Maxwell, who helped Australia to 376-9.
Hashim Amla hit his highest One Day International score with a majestic 159 and Faf du Plessis grabbed a century to drive the Proteas to 411.
The opening batsman's 159 off 128 balls led South Africa to their second knock of over 400 in the Cricket World Cup, setting a near impossible target.
Captain AB de Villiers took his team to a sterling victory against the West Indies, with his 162 from a mere 66-ball knock.
The South African captain brought the Protea Fire with a record-breaking 64-ball 150, which is the fastest in One Day International history.
The coach had come under fire over his team's recent losing streak, as well as a text message row that has made Australia the laughing stock of rugby.
Pat McCabe and Nathan Charles being injured has left the Australian rugby team with few lineup choices.
Bernard Foley kicked a penalty a minute from time to give the Waratahs their maiden Super Rugby title with a 33-32 victory over the Crusaders.
Uruguay's Luis Suarez could face a lengthy ban if an investigation by Fifa proves allegations he bit Italy defender Giorgio Chiellini are true.