The Blitzboks lost 21-15 to Fiji in the Cup semi-finals of the Hong Kong Sevens, before overcoming Samoa in the third place play-off.
The Blitzboks won their remaining two pool matches to cruise into the Cup quarter-finals.
The Blitzboks backed up their win over Argentina, with victories over Japan and France on day two of the Hong Kong Sevens.
The Blitzboks beat Argentina 24-0 in their opening match of the Hong Kong Sevens on Friday.
Rugby sevens will make its Olympic Games debut on 6 August 2016.
World Rugby takes a look at the new host city of the South African leg of the Sevens World Series.
Cape Town will replace Port Elizabeth as host city for the South African leg of the Sevens World Series.
Fiji beat the Blitzboks and New Zealand to win the Cup title.
Fiji claimed a 24-19 win against South Africa before beating New Zealand 35-19 in the Cup final of the Las Vegas Sevens.