These results leave South Africa in joint second place on the log and in a battle of pool survival at 07h34 (SA time) on Saturday, when they face New Zealand, who earlier defeated Uruguay and Australia.
Quewin Nortje was the star against Uruguay in the opening match, but Gino Cupido's try on his Blitzbok debut will also live long in the memory banks.
Nortje found space on the outside before offloading to Siviwe Soyizwapi to open the scoring in the second minute and then scored himself soon after, following a blistering run down the line.
The Blitzboks defended really well in the opening half and from such stout defence, Shilton van Wyk benefitted from a loose pass and raced 80m to score for a 19-0 lead at the break.
The second half had more of the same coming to the South American side. Nortje again blitzed them on the outside for his second try before Cupido scored with his first touch of the ball. The lanky outside centre ghosted past his marker to ran in from 70m out.
Quewin Nortje in action against Australia.
Uruguay did get one back after a rare missed tackle by the South Africans, who retaliated immediately with a try by Ricardo Duarttee, stepping inside some defenders for his first points of the tournament.
The match against Australia showed little of the momentum from the first encounter.
Australia conceded a yellow card in the opening minute, but the Blitzboks failed to take advantage of the extra player. Once the Aussies were back to seven, they pounced, scoring in quick succession, both times exploiting SA's defensive alignment. Their third try came from a restart that the men in green got horribly wrong.
Selvyn Davids pulled one back for his side, but when Australia scored again, the defeat was a stark reality for South Africa.
Scorers:
South Africa 40 (19), Uruguay 7 (0)
SA - Tries: Siviwe Soyizwapi, Quewin Nortje (2), Shilton van Wyk, Gino Cupido, Ricardo Duarttee. Conversions: Tristan Leyds (2), Selvyn Davids, Duarttee (2).
Uruguay - Try: Alfonso Silva. Conversion: Juan Manuel Tafernaberry.
South Africa 7 (0), Australia 26 (21)
SA – Try: Selvyn Davids. Conversion: Ricardo Duarttee.
Australia – Tries: Josh Turner, Henry Paterson (3). Conversions: Maurice Longbottom (3).
