Simon Harmer picked up four wickets as South Africa staged an incredible fightback to shock India by 30 runs in a low-scoring first Test match.
India's staggering, unwanted run of consecutive ODI toss losses extended to 20 matches.
Vice-captain Rishabh Pant said India's batters should have adapted to the challenge of playing on a tricky pitch at the Eden Gardens in Kolkata.
Virat Kohli's second successive hundred was not enough as South Africa, aided by Aiden Markram's ton, chased down a target of 359 to clinch a four-wicket win and level their one-day international (ODI) series 1-1 in Raipur on Wednesday.
Asked about losing yet another toss, Gill quipped, 'I think the only toss that I'm going to win is hopefully in the WTC finals.'
India skipper KL Rahul said his side needed to be sharper in key moments but felt the toss played a decisive role in the home team's four-wicket loss to South Africa in the second ODI, in Raipur, on Tuesday.
Yashasvi Jaiswal smashed his maiden ODI hundred to power India to a 2-1 series win after they thrashed against South Africa by nine wickets in the third and final ODI.
South African pacer Kagiso Rabada, who missed the first Test against India in Kolkata due to a rib injury, is in awe of his team's ability to rebound from setbacks.
South Africa were dealt a major blow before the first ball was even bowled, with pace ace Kagiso Rabada ruled out of the opening Test against India due to a rib injury.
Application required in Test cricket was missing, says Kumble after India's batting collapse
India will look to address several lingering selection puzzles when they take on South Africa in Ranchi on Sunday in the first ODI of the three-match series, where Rohit Sharma and Virat Kohli return to the set-up for a short audition that could well shape their 2027 World Cup fate.
Virat Kohli said he is 'feeling really free' mentally after producing another match-winning effort to help India clinch the three-match ODI series.
The Proteas have included three frontline spinners in the squad with Keshav Maharaj leading the attack, while also consisting of Simon Harmer and Senuran Muthusamy, who was the player of the series against Pakistan.
With Bumrah leading the charge, India prised out five wickets in the second session to snuff out South Africa's hopes of reaching the 200 mark.
India will look to reprise their home template of big first-innings totals and sustained spin in the short two-Test series against South Africa beginning in Kolkata on Friday.
India great Virat Kohli continued his push to regain his place as the best ODI batter while moving up to the second spot in the latest ICC rankings released on Wednesday.
Kohli finished the series with 302 runs at an astonishing average of 151 and a strike rate of 117-plus, including two centuries and a fifty.
At stumps, Sai Sudharsan and Kuldeep Yadav were at the crease with India requiring another 522 runs to win and level the two-Test series.
A record-extending 52nd ODI century by Virat Kohli and a rapid 57 from Rohit Sharma paved the way for India's victory in the series-opener in Ranchi.
India captain Shubman Gill, head coach Gautam Gambhir along with Jasprit Bumrah, Washington Sundar and Axar Patel arrived in Kolkata late on Sunday ahead of the upcoming two-Test series against South Africa.
While the white-ball trophy cabinet kept getting heavier, Team India's fortunes in Test cricket swung wildly between hope and despair in 2025.
'You don't come to a country to win a Test match, you obviously want to win the series.
The collapse, India's lowest failed chase at home, has left behind deeper fault lines than a dry Eden Gardens wicket can conceal.
Captain Rishabh Pant conceded that India needed to get better as a Test team.
South Africa coach Shukri Conrad was overwhelmed to see his spinners rule the roost in the first Test against India at the Eden Gardens, signalling to him that the Rainbow Nation is no longer an exclusive "fast bowling country" and hoped that a lot more slow bowlers will emerge.
Images from Day 1 of the first Test between India and South Africa, in Kolkata, on Friday.
South African captain Temba Bavuma has said that the ICC Champions Trophy is a bigger challenge than the 50-over World Cup because the lesser number of matches makes it tough for teams to make a comeback.
This is the first time in nearly seven decades that India have suffered two successive series whitewashes at home.
India A skipper Rishabh Pant will look to build on the gains from the first match, while the likes of Mohammed Siraj and Kuldeep Yadav will aim for crucial red-ball game time in the second four-day match against a Temba Bavuma-led South Africa A in Bengaluru from Thursday.
South Africa fast bowler Anrich Nortje has been named in their Twenty20 International squad for the five-match series against India next month, the first time he will have played for the side since the 2024 T20 World Cup final.
Virat Kohli's second successive ton during the second ODI against South Africa here seemed "inevitable" as the stalwart got off the mark with a six, carrying the confidence of his first-game heroics, feels former India captain Sunil Gavaskar.
South Africa all-rounder Marco Jansen says stopping world-class batters like Virat Kohli becomes almost impossible once they settle in.
South Africa's experienced pacer Kagiso Rabada said their young team are ready for the challenge.
For the first time in many years, India are going into a home Test match as underdogs and not favourites. Ask any player worth his salt and he would tell that it is not a happy place to be.
India head coach Gautam Gambhir mounted a strong defence of the tough Eden Gardens pitch despite losing to South Africa in the first Test.
South Africa batting coach Ashwell Prince said the Proteas' ODI side still needs to sharpen its temperament in "clutch moments".
India bowling coach Morne Morkel admitted his side was "surprised" by how quickly the Eden Gardens surface "deteriorated" after a dramatic second day in which 15 wickets fell and the opening Test swung sharply in India's favour.
Countering Bumrah before spinners come into play will be key for SA: Graeme Smith
Virat Kohli has two hundreds and a fifty in his last three innings, while Rohit Sharma has a hundred and two fifties in his last four outings.
South African stand-in captain Aiden Markram said home side Pakistan were well within their rights to prepare extreme turning wickets for their two-Test series, which starts in Lahore on Sunday, as they did last year to beat England.