Australia 351 (M Marsh 96, Smith 56, Warner 51, Maharaj 5-123, Philander 3-59) and 213 for 9 (Bancroft 53, Morkel 3-42, Maharaj 3-93) lead South Africa 162 (De Villiers 71*, Starc 5-34, Lyon 3-50) by 402 runs
Durban: South Africa fought back in second and final session on the third day of the first Test but could not stop Australia from forging a commanding lead at Kingsmead on Saturday.
Australia were 213 for nine when bad weather force early stumps on third day, an overall lead of 402. 340 is the highest ever successful run-chase at Kingsmead
Cameron Bancroft (53), Steven Smith (38) and Shaun Marsh (33) the top-scorers; Morkel (3-42) and Maharaj (3-93)
Opening batsman Bancroft made 53 and got Australia off to an aggressive start to their second innings together with David Warner in an opening stand of 56 in 13 overs.
Australia reached 112 for three at lunch but the scoring rate stalled after lunch with stroke play proving difficult on a slow pitch against disciplined bowling. The tourists added 63 runs in 27.5 overs for the loss of three wickets during the afternoon.
Australian captain Steve Smith made 38 but was unable to bat with fluency in an 81-ball innings before he was trapped leg before wicket by part-time left-arm spinner Dean Elgar.
Shaun Marsh laboured for 99 balls to make 33. He was Morne Morkel' first wicket in this test. Before he out, twice surviving South African reviews for leg before wicket, the first when a ball from left-arm spinner Keshav Maharaj hit him in the "umpire's call" zone and the other when a delivery from a hostile Kagiso Rabada pitched outside leg stump.
Rabada had first-innings top-scorer Mitchell Marsh caught at first slip for six while Maharaj claimed his third wicket of the innings when Tim Paine (14) edged him to slip in the last over before tea.
Bancroft hit his first fifty since he made 82 not out on debut against England in Brisbane in November.
He was struck on the body by a hostile lifting delivery from Morne Morkel in a testing first over when Australia started their second innings with a comfortable cushion of a 189-run first innings lead.
But he went on to make an impressive 53 off 83 balls with ten fours before he was stumped off Maharaj.
For South Africa Maharaj and Morkel picked up three wicket each.