Fast bowler Mitchell Starc took two wickets as Australia went in search of a series-deciding victory on Day Three of the third Test against South Africa here on Thursday.

South Africa were 140-4 in their second innings at stumps, 40 runs ahead with six wickets remaining. Starc dismissed opener Aiden Markram (1) and Marques Ackerman (62). Earlier, Josh Inglis completed his second Test century before Australia were bowled out for 429.