One back gets injured, another messes up a tackle and sees red in the first 10 mins. What then.
A red card in the backs would hurt both teams equally regardless of a 7-1 split.
As for an injury in the backs.
In case of injury here is what happens
9. Faf (Reinach comes in at 9, Kolbe can fill in here in emergency,)
10. Libbok (Faf goes to 10, Reinach comes in at 9, Kolbe can come here in an Emergency)
11 Kolbe (Reinach comes in at 11)
12 De Allende (Willemse moves to 12, Arendse or Kolbe moves to 15, Reinach comes in at wing)
13 Kriel (De Allende moves to 13, willemse goes to 12, Arendse or Kolbe goes to 15 and Reinach comes in at wing)
14 Arendse (Reinach comes in, Willemse can also cover)
15 Willemse (Kolbe or Arendse moves here, Reinach takes wing, Kriel has played much of his rugby at 15 but we need him at 13, Manie at a pinch can go there too)
Two injuries? Then Kwagga comes in on the backline. Bongi wont be taken off soon as an insurance policy.