South Africa won the toss and chose to bat first in the second test against Bangladesh on Friday.
The home team also kept an unchanged lineup from its victory in the first match.
Bangladesh has made two changes as it tries to save a draw in the two-test series.
Opening batsman Tamim Iqbal returns to the lineup in Gqeberha, the city formerly called Port Elizabeth, after missing the first game with an illness. Left-arm spinner Taijul Islam also plays in place of pace bowler Taskin Ahmed, who picked up a shoulder injury in the first test.
Bangladesh won the one-day series on this tour, the first time it has won a series of any kind in South Africa.
The tourists also looked competitive at times in the first test in Durban before crumbling to 53 all out on the final day to lose by 220 runs.
South Africa has a changed squad for the series with a number of top players missing because of the Indian Premier League.
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