South African off-spinner Simon Harmer is a tricky customer who has provided vital wickets on tours of India and Pakistan last year.
Harmer has come on after lunch and he has threatened, but the Aussies have been score some runs off him.
A groundsman works on the pitch during a drinks break on day one.AP Photo/Themba Hadebe
More concerning, Nortje is still running in hard and challenging the Aussies with some fast, bouncy deliveries.
Renshaw and Carey have eaten up a little over 80 balls in this session, they are not in a hurry.
Australia are 4-119 from 40 overs with Renshaw on 16 and Carey on 13.