Sibusiso Nkosi scored two brilliant tries as South Africa defeated Argentina 24-18 on Saturday in a Rugby World Cup warm-up match in Pretoria.

The winger struck in each half for the Springboks, who found the going much tougher than last weekend when they hammered the Pumas by 33 points in Salta to win the Rugby Championship.

All the other South African points at Loftus Versfeld came from fly-half Elton Jantjies, who kicked a conversion and four penalties.