"South Africa are the No. 1 team in the world. We have to play consistent cricket for long periods of time to put them under pressure. That will be the endeavour. Our style of play will not change," said Shastri, who was retained as team director after India registered a historic Test series win in Sri Lanka recently.
"If you reflect on our performances in Australia and Sri Lanka, you will see that consistency was the difference between defeat and victory. Sustained brilliance will be the key against the Proteas," he said.
"We were not patient enough both in Australia and during the first Test in Sri Lanka. Once the patience and discipline came, in the next two Tests, we saw the results," he told bcci.Tv
India and South Africa square off for the first time in a four-Test series, in addition to playing five ODIs and three T20s. The tour begins with a T20 International match at Dharamsala on October 2.
"I know he has copped a lot of flak over the aggression and he will learn where to draw the line. But let me assure you, he has the backing of the entire team. I want him to be aggressive and I will be the first one to push him in that direction. But I will also mark the line.