South Africa skipper Siya Kolisi has received a citing commissioner warning but will be available for next Saturday's clash against Wales in Cardiff.
Kolisi was given the warning by match citing commissioner David Pelton for striking Scotland back Peter Horne with his head during the Springboks' 26-20 victory at Murrayfield two days ago.
But the flanker has avoided being cited and facing a subsequent disciplinary hearing.
It means that Kolisi can spearhead South Africa's bid for only a second win in their last six games against Wales.
Erasmus, meanwhile, has described Wales as the Springboks' toughest opponent of their northern hemisphere tour, which has so far seen them lose to England by a point before beating France and Scotland.