Dean Elgar and Hashim Amla raised South African hopes of victory with a solid second-wicket partnership on the fourth day of the third and final Test against India at the Wanderers Stadium on Saturday.
South Africa were 69 for one at lunch, 172 runs short of a target of 241.
Elgar was on 29 not out and Amla was unbeaten on 27. Their partnership was worth 64. They added 52 runs in 90 minutes on Saturday after early morning rain delayed the start by an hour.
Although conditions remained difficult for batting, the pitch appeared to pose fewer hazards from unpredictable bounce than earlier in the match.
Play had been halted late on Friday afternoon after Elgar was struck on the helmet by a ball from India's Jasprit Bumrah. It was one of several balls that behaved unpredictably on a pitch which has been criticised by several former international players.
The match officials and captains met after the stoppage and the International Cricket Council (ICC) announced that the umpires, Aleem Dar and Ian Gould, in consultation with match referee Andy Pycroft, had decided that play would resume on Saturday.
The announcement said the umpires would continue to monitor the pitch and consult the match referee should it deteriorate further.
Completing the over he had started on Friday, Bumrah's first ball was a bouncer which flew high over Elgar's head and went for five wides.