The reigning World Cup champs’ win against the South African team gave them a 4-0 series lead.
Eight-time World Player of the Year Luciana Aymar gave the South African defence a torrid time, while Carla Rebecchi got a brace with a penalty corner goal in the 22nd minute and the winner from open play in the 56th.
An Agustina Albertario strike in the 16th minute made up Argentina’s set of three goals.
Pacy South African runner Bernie Coston, who took a quick self-pass before shrugging off heavy challenges to set up Celia Evans’ crisp strike for the opening goal in the fifth minute.
The girls in green and gold had other chances in the match, and scored soon after the break through the hardworking Illse Davids.