Technology not needed and not used
Australia had the opportunity to make first use of the Decision Review System when Josh Hazlewood had an appeal against Hashim Amla in the first over. Hazlewood delivered a full fourth ball of the over, which moved in as the others had, and struck the opener in front of leg stump. Umpire Joel Wilson probably thought it was going down leg and gave it not out. Had he thought it was clipping and given it out, he would have been just as correct. Replays showed that a major chunk of the ball would have gone on to hit leg stump and that Wilson's on-field call - whatever it was - would have stood. Luckily for Amla it was not out. Luckily for Australia, they did not ask for the review.
Technology needed and used
Four overs later, Hazlewood was asking questions around the pads with a full length. He got one to curl into Quinton de Kock, who missed the flick and subsequently ran a leg bye. Umpire Wilson gave it as runs, even as Hazlewood appealed. Steven Smith decided to ask for the third umpire to have another look. Several replays revealed two noises but with no evidence of an inside edge, they seemed to come from the ball hitting the front pad and then the back one. Ball tracking showed it would have gone on to hit the stumps. Still, the evidence was scant and the South African dressing room thought so as they crowded around to peer at a television screen. When Wilson's call was overturned, all of them, including coach Russell Domingo, demonstrated their disbelief but de Kock had to go.
Technology not needed but used
South Africa were in early trouble and their top-scorer from the opening match, Rilee Rossouw, was given out to a Nathan Lyon delivery by Umpire Richard Illingworth. Rossouw called for a review even though he looked out, with the ball straightening and striking him in front of off stump as he pushed forward and missed. The tracker revealed he was as out and Illingworth was vindicated.
Forget technology - out is out
In the second over of the chase, another batsman's pads were rapped. Wayne Parnell, making his return after 11 months out of the national team, delivered a full, straight ball that jagged back and hit David Warner in front of leg. It was given out and Warner decided it would stay out. He walked off without even considering the review - which would likely have been umpire's call - to give South Africa an early breakthrough, setting the tone for the rest of the innings.
Beginner's (bad) luck
In his first appearance for South Africa, chinaman bowler Tabraiz Shamsi got the biggest endorsement a new player could ask for when AB de Villiers decided to review his first appeal. Shamsi believed the second ball he bowled, to Aaron Finch - a flat, ripping legbreak which pitched outside off and struck him in front of off - would have gone on to hit the stumps and de Villiers agreed. The ball was turning so much that initially it seemed it would miss leg stump, but replays showed the ball to be clipping. It was South Africa's most convincing review of the game, even though it was unsuccessful.
Beginner's good luck
Shamsi did not have to wait long to get his first wicket. Three balls later, Shamsi delivered another leg break, around middle stump, to Glenn Maxwell and it seemed to be missing leg but Umpire Wilson did not think so. He sent Maxwell on his way and Shamsi into celebration. A review would only have spoilt his mood as replays showed the ball was missing leg stump.