Dragons RFC scrum half Gonzalo Bertranou grabbed a first half try bt it was South Africa who produced a much improved display after the interval to overcome Argentina for the second time in a week following a 24-13 triumph in Buenos Aires.
The Springboks opened the game’s account via a Manie Libbok penalty, but Los Pumas would go into the break 10-3 in front through Bertranou’s try - his fifth in 15 games - and Emiliano Boffelli’s three-pointer.
Jacques Nienaber’s charges responded at the start of the second period as Makazole Mapimpi and Canan Moddie touched down to regain their advantage.
It was a lead they would not relinquish as Libbok sealed the win with a trio of penalties.
