India's domination in the 2017 T20 World Cup was supposed to be cemented by a blue wave on Sunday night, but the Narendra Modi Stadium was confronted by a clinical Proteas "green wall." Not only did South Africa defeat India by 76 runs in the Super 8 match, but it was also a tactical masterclass in reading situations and flexibility. The actual story was a bowling effort that turned the most threatening batting lineup in the world into sawdust, even though David Miller's 63 set the stage.
Lungi Ngidi was a man who embodied the tactical brilliance of the Proteas. Even while his numbers of 4-0-15-0 don't have the same glitz as a five-wicket haul, they were the "slow poison" that gradually destroyed the Indian team.

The Weapon of the Slower Ball
Indian hitters struggled not just to middle the ball but also to hit boundaries. The Indian hitters were compelled to alter their strategy and depend on their own strength to strike the ball when they saw the scoreboard remain still. The plan proved to be a total failure.
While Ngidi had India work in first gear, Marco Jansen made devastating use of his 6'8" size, bowling a "heavy length" that extracted uneven bounce and taking 4/22. Because of this height advantage, his slower balls were especially harder to read because they fell from a higher trajectory than Indian batters were used to. Very few opportunities were lost in the field because of the Proteas' incredibly accurate fielding.

Even the legendary Ravichandran Ashwin of India claimed that Suryakumar Yadav's team was ill-prepared for the match against South Africa.South Africa taught India a valuable lesson. Don't arrive at games unprepared, please. South Africa only bowled slower deliveries against our hitters, so we weren't ready. Of the 22 deliveries that Suryakumar Yadav had to deal with, 17–18 were slower. Not a single delivery was back-of-a-length; they were all either full or delayed. Where credit is due, give it. When it came to the ball, South Africa was outstanding. Under pressed, they were terrific with the bat. They are no longer "chokers" in South Africa. "They've evolved," he declared.

The Masterclass in Middle Order
Within the first four overs, South Africa was struggling at 20/3, but David Miller and Dewald Brevis managed a well-thought-out counter-rebuild. They chose Varun Chakaravarthy and Washington Sundar as their main targets, attacking the latter in particular to break India's rhythm. The two "dropped the ego" and concentrated on hard running and gap-picking in the middle overs to keep the scoreboard moving, as Proteas skipper Aiden Markram subsequently disclosed following the match, before erupting in a 97-run stand.
David Miller, a batsman for South Africa, also described how he and Dewald Brevis planned their strategy against Varun Chakravarthy of India, who ultimately gave up 47 runs in 4 overs.

"I believe it's just about making sure we were on it, meaning we have to put it away if he bowls a terrible ball. There was a little bit more intent tonight, and the line wasn't spinning too much, so you can kind of trust it.

And after we had that feeling, we decided that we had to eliminate him since he poses a threat to any squad he plays against. After the game, Miller, who hit 63 off 35 balls, told reporters, "It was definitely something that we did speak about."