South Africa 329 and 387 (Wiaan Mulder 115, Ryan Rickelton 101, Marques Ackerman 62, Mitchell Starc 3-65) lead Australia 429 (Josh Inglis 102, Alex Carey 80, Matt Renshaw 74, Simon Harmer 4-104, Marco Jansen 3-60) by 287 runs after day four. The series decider between Australia and South Africa is set to go down to the wire.