Aoife Dalton, Linda Djougang (2), Jane Clohessy, Beibhinn Parsons and Erin King cross for Irish; Aseza Hele, Vainah Ubisi, Maria Tshiremba, Lerato Makua and Alichia Arries score for hosts
Ireland captain King sin-binned for high tackle in 23rd minute
Only previous encounter was a 37-0 win for Ireland in 2006 World Cup
Sides will meet again at Athlone Stadium on 31 October
Live Reporting
Issy Todd
Converted Try - South Africa 17-33 Irelandpublished at 15:17 BST 24 October
15:17 BST 24 October
Erin King (con Dannah O'Brien)
The Irish pressure pays off!
Niamh O'Dowd times a perfect pass to her captain and Erin King goes crashing over to extend her side's lead to 31-17.
Dannah O'Brien slots the extras to make it four conversions out of five to extend the lead to 33-17 with less than half an hour to go.
After building some patient phases towards the try line, Aoibheann Reilly sees space and looks to go herself but she is bundled in touch and South Africa will have the line-out.
Converted Try - South Africa 17-21 Irelandpublished at 14:47 BST 24 October
14:47 BST 24 October
Jane Clohessy (con Dannah O'Brien)
With the clock over two minutes into the red, Jane Clohessy goes crashing over the whitewash for Ireland's third try and is met by lots of hugs and celebrations as a result.
Dannah O'Brien continues her successful off the tee and the visitors will head into the changing rooms ahead by four points.