Indian openers Rohit Sharma and Mayank Agarwal continued their onslaught against South Africa in Visakhapatnam as they put on an unbeaten 100 runs partnership for the first wicket.

Both the batsmen looked in control as Mayank Agarwal reached his fifty with a six over covers off Keshav Maharaj post Lunch.

Earlier, The hosts dominated the first session as the openers helped India reach 91/0 at lunch. Rohit, who is promoted up the order, was unbeaten on 52 runs while Agarwal had scored 39 runs.

India captain Virat Kohli opted to bat after winning the toss in the first Test against South Africa starting here on Wednesday.

India had named their playing XI on the eve of the match with Rohit Sharma in as an opener and Wriddhiman Saha back behind the stumps in place of Rishabh Pant.

South Africa are going into the match with five bowlers including three spinners -- off-spinner Dane Piedt, left-arm spinners Keshav Maharaj and Senuran Muthusamy.

India: Rohit Sharma, Mayank Agarwal, Cheteshwar Pujara, Virat Kohli (capt), Ajinkya Rahane, Hanuma Vihari, Wriddhiman Saha (wk), R Ashwin, Ravindra Jadeja, Ishant Sharma, Mohammed Shami South Africa: Aiden Markram, Dean Elgar, Theunis de Bruyn, Faf du Plessis (captain), Temba Bavuma, Quinton de Kock (wk), Vernon Philander, Senuran Muthusamy, Keshav Maharaj, Kagiso Rabada, Dane Piedt.