South Africa's cricket selectors are set to make two changes to the side that downed Australia by 231 runs in the second Test.
Wayne Parnell has a groin strain and will miss the series decider in Cape Town, which starts on Saturday, while Quinton de Kock is expected to be dropped after failing to impress on his debut.
Alviro Petersen, who missed the clash in Port Elizabeth due to illness is likely to take de Kock's place.
Meanwhile the home coach Russell Domingo has said a claim by the Australian opener David Warner that South Africa's bowlers tampered with the ball during the second test, has "added 10 percent motivation" to his side going into the deciding test.
