Bas de Leede and Fred Klaassen each took two wickets in the meanwhile. South Africa's top scorer was Rilee Rossouw,who hit 25 runs off 19 balls.
At first, Colin Ackermann was in excellent form and scored an unbroken 41 runs off 26 balls to help his team reach 158 for four in 20 overs.
Ackermann scored three fours in addition to his unbroken run.
Stephan Myburgh, who bats first, also played a significant innings, scoring 37 runs off 30 balls, including seven fours.