Springbok captain Siya Kolisi says the Boks will need 15 players on the pitch at all times if they are to beat Ireland for the first time in Dublin in 13 years.
The Boks play Ireland at the Aviva Stadium in Dublin on Saturday evening in the fourth match of their end of year tour.
Kolisi says his teammates have been working hard to improve their tackle techniques so as not to fall foul of the officials.