Cape Town - South Africa won the toss and decided to bat in the third and final Twenty20 international against England in Pretoria on Sunday.
"It's a good chance to bat first so we can put the English under pressure," said South African captain Quinton de Kock.
The first two matches were shared, with the side batting first winning on both occasions in matches which went down to the last ball.
But England captain Eoin Morgan said he would probably have chosen to bowl if he had won the toss.
"It looks a really good wicket," he said.
South Africa made two changes, with batsman Heinrich Klaasen replacing Jon-Jon Smuts and fast bowler Dale Steyn returning in place of Beuran Hendricks.
England made what Morgan described as a "forced change" with Dawid Malan playing in place of Joe Denly, who was ill.
South Africa: Temba Bavuma, Quinton de Kock (captain, wicket-keeper), David Miller, Rassie van der Dussen, Heinrich Klaasen, Andile Phehlukwayo, Dwaine Pretorius, Dale Steyn, Bjorn Fortuin, Tabraiz Shamsi, Lungi Ngidi
England: Jason Roy, Jos Buttler (wicket-keeper), Jonny Bairstow, Dawid Malan, Eoin Morgan (captain), Ben Stokes, Moeen Ali, Chris Jordan, Tom Curran, Adil Rashid, Mark Wood