The Springbok Sevens team have been beaten by their nemesis Fiji in the quarter-finals of the Hong Kong Sevens on Sunday.
Fiji won 14-12.
In the other quarter-finals, Samoa beat the USA 24-7, England overcame Australia 26-19, while New Zealand were too strong for Kenya, winning 21-12.
In the Cup semi-finals, Samoa will face England while Fiji and New Zealand will square off.
South Africa will face Kenya in the semi-finals of the Plate section.