Cape Town - Werner Kok scored his 100th World Rugby Sevens Series try as the Blitzboks outclassed Samoa in their final Pool A clash at the Hong Kong Sevens on Saturday.
The Blitzboks won 21-7, after leading 7-0 at the break.
Apart from Kok, Impi Visser and Justin Geduld also crossed the whitewash for South Africa.
In their first game on Saturday, the Blitzboks beat Scotland 26-10, while they beat Japan 22-7 on Friday.
In Sunday's Cup quarter-finals, the Blitzboks will face USA, sneaked through despite losing to both Wales and England.
Kick-off is at 04:58 (SA time) on Sunday.
Tries: Impi Visser, Justin Geduld, Werner Kok
Conversion: Branco du Preez (2), Selvyn Davids
Try: Tomasi Alosio
Conversion: Murphy Paulo