India A extended their dominance over South Africa A on day one of the first four-day match in Thiruvananthapuram, bowling the visitors out for 164 before going to stumps within 35 runs of taking a first-innings lead with eight wickets in hand. Shardul Thakur's three-wicket burst played a key role in dismissing the South Africans cheaply before captain Shubman Gill struck an unbeaten 66 to put India A in a commanding position.

The India A quicks wreaked havoc with the new ball and the spinners cleaned up the tail to shoot out South Africa in the 52nd over. The visitors were in deep trouble at 22 for 5 in the 13th over before some lower-order contributions saved them from a complete collapse. Mohammed Siraj had the captain Adien Markram caught behind for a four-ball duck in the first over and Thakur followed that up with the wicket of Pieter Malan for an eight-ball duck in the fourth, to leave the scoreboard reading 0 for 2.

There was no respite with the introduction of spin either, as Shahbaz Nadeem removed No. 3 Zubayr Hamza for 13, and Thakur soon sent back Khaya Zondo and Heinrich Klaasen in consecutive overs to leave them five down.

A series of small partnerships thereafter - 30, 31 and 30 for the sixth, eighth and ninth wickets respectively - took South Africa past 100. Wiaan Mulder scored 21 and Dane Piedt chipped in with a quick 33 off 45, with six fours. But it was for the final wicket that the visitors added the most runs - 33 - with Marco Jansen top-scoring with an unbeaten 45, with four fours and two sixes, and Lungi Ngidi, the last man out, contributing 15.

K Gowtham, who was reported unwell on the eve of the match, chipped in with three lower-order wickets, including those of Piedt and Mulder. Thakur finished with 3 for 29 while Nadeem bagged 2 for 37.

In response, India started fluently, the openers adding 48 before Ruturaj Gaikwad was bowled by Jansen for 30. Gill was then joined by Ricky Bhui for a 58-run stand, which was broken by Ngidi, who cleaned up Bhui for 26, before Gill and No. 4 Ankit Bawne negotiated the last few overs of the day.