"There's a lot of speculation over wickets throughout the series. It's just a question of adapting to the surface. There were talks about the pitch in Chennai also, but we adapted well there," Smith said on the eve of the match.
South Africa lead 1-0 following their crushing win by an innings and 90 runs in the second Test in Ahmedabad. The opening match ended in a draw in Chennai.
It will be no surprise if India name three spinners in the playing eleven in a bid to square the series on a pitch expected to help slow bowlers.
Indian spinners Anil Kumble and Harbhajan Singh have so far failed to keep pressure on South Africa, who posted 540 and 331-5 in Chennai and 494-7 declared in Ahmedabad.
AB de Villiers was named man of the match for his unbeaten 217 in Ahmedabad. Jacques Kallis, Neil McKenzie and Hashim Amla also have scored centuries.
"It's all about playing to our potential. It's about maintaining our focus and executing our plans. Hopefully, we adapt to the wicket here. I am sure we are the better prepared team going into this Test," said Smith.
"I think the track, as it looks now, opens up more possibilities for all bowlers. That's encouraging for us. We have got more variety, more pace. We have played a lot more determined cricket in this series."
South Africa need only a draw here to clinch their second Test series in India, their only success coming under Hansie Cronje in 2000.
India have lost just two home Test series in the last two decades, their other defeat coming against Australia in 2004.
"Only two teams have beaten India in India in the last 20 years and that proves how tough the tour is. We have won in Pakistan (in 2007) and then in Bangladesh (this year)," said Smith.
"We are well prepared to go into this Test and hope to play the same brand of cricket. I think we are more confident going into this match.
"We are the team under less pressure. India are the team with more question marks, in terms of selection and injuries. They are also 1-0 down. The important thing for us is to maintain our standards."
The hosts are struggling to find a winning combination after their bowlers' below-par performances in the last two Tests.
Paceman Ishant Sharma has regained fitness after missing the first two matches due to finger and toe injuries, while skipper Kumble is yet to recover completely from a groin strain.
It will be known only Friday morning whether Kumble is fit for the match.