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Mack Hansen crosses for Ireland in the 33rd minute
Cheslin Kolbe scores for SA's first try on 52 minutes
Ireland now four points ahead of South Africa in Pool B
World number one side Ireland beat world champions South Africa
HT: South Africa 3-7 Ireland
Chris Henry
Former Ireland flanker on BBC Radio Ulster
Garry Ringrose probably has the highest tackle count of the team
But it's the type of tackles he makes, his ability to read the ball and make those decisions.
How lucky are we to have him defending those channels for us?
HT: South Africa 3-7 Ireland
Bobby Skinstad
Former South Africa captain on BBC Radio 5 Live
South Africa are just looking a bit jaded, they will have wanted the half to end, Ireland won't.
South Africa 3-7 Ireland
It's been brilliant, it's been brutal and Ireland lead.
What a half of rugby.
South Africa 3-7 Ireland
Ireland win the throw and come forward. The clock is in the red but we'll go until the ball goes dead!
South Africa 3-7 Ireland
There's a huge roar as Ireland win a penalty.
In the middle of it all, Ringrose put in a huge hit, gets on his feet and puts in another hit, which eventually results in the penalty on halfway.
Into the corner we go.
South Africa 3-7 Ireland
Chris Henry
Former Ireland flanker on BBC Radio 5 Live Sports Extra and Radio Ulster
A huge five minutes now for Ireland to regather this, play smart and get back out of their own half and hopefully give themselves a chance to push on from this now.
South Africa 3-7 Ireland
In good news, Gary Ringrose is back on the field after his HIA.
South Africa 3-7 Ireland
Tommy Bowe
Former Ireland winger on BBC Radio 5 Live
Brilliant! Wonderful play by Ireland. Short-pass play, what a great effort but boy, South Africa are putting them under pressure too. It just shows how dangerous Ireland can be when they take the set-piece well.
Just what Ireland needed!
South Africa 3-7 Ireland
He can!
Caelan Doris makes a big carry and du Tot is penalised at the breakdown.
Ireland have the chance to clear and launch another attack.
South Africa 3-7 Ireland
We can stop for a quick breath as we wait for the restart.
South Africa go long and force the line-out in the 22.
It functioned at the right end, now can Kelleher relieve pressure?
South Africa 3-7 Ireland
Chris Henry
Former Ireland flanker on BBC Radio 5 Live Sports Extra and Radio Ulster
Did we ever need that more than right now?
Mack Hansen (Johnny Sexton con)
Magic Mack strikes again!
Sexton is brought down on the line but Ireland work it quick and wide, and the Irish wing manages to cross.
He stumbled as he dived to the turf and almost crossed the line, but he spares his blushes and got it down just in time!
Sexton adds the extras!
Image source, InphoSouth Africa 3-0 Ireland
Chris Henry
Former Ireland flanker on BBC Radio 5 Live Sports Extra and Radio Ulster
This game is just the smallest of margins and the smallest of moments.
South Africa 3-0 Ireland
Chris Henry
Former Ireland flanker on BBC Radio 5 Live Sports Extra and Radio Ulster
Iain Henderson is one of the best line-out callers around and it's not just the one person it's a full unit eight players but I'm sure he's sitting on the touch-line thinking am I needed to come on now, sooner rather than later.
South Africa 3-0 Ireland
Robbie Henshaw kick possession away so we go back for the penalty.
Ireland go for the corner again. That's a bold call.
South Africa 3-0 Ireland
Bundee Aki! He barrels his way into the South African 22. A huge carry but he's chopped down.
South Africa slow it down and there are some massive hits coming in as Ireland go through the forwards.
Ireland go wide and have the advantage!
South Africa 3-0 Ireland
Tommy Bowe
Former Ireland winger on BBC Radio 5 Live
This game is incredible. It may only be 3-0 but there is nothing between these two sides. It's just been the small errors, both teams have been guilty of it.
The Irish supporters, 35,000 of them, they are so behind this team but Ireland need to get themselves onto the scoreboard.
South Africa 3-0 Ireland
Another highlight from that passage was Tadhg Furlong standing with the ball just willing the white shirts to have a go at him.
*Spoiler alert*
It was like the end of James Bond when Daniel Craig is standing waiting for the missiles to land.
I'd rather be hit by the rockets than the Springbok forward pack.
South Africa 3-0 Ireland
Chris Henry
Former Ireland flanker on BBC Radio 5 Live Sports Extra and Radio Ulster
This South Africa, we know of, it does appear sitting here that they have taken it to another level, which is scary.
Ireland of recent years have lived up, contested themselves and matched the physicality of those teams and have brought the brain and the brawn.
It just seems in the opening bit that the South Africa pack have dominated set piece, line-out wise they have really dominated and the collisions you've got to say have all been South African winners.
Nervy times here.
South Africa 3-0 Ireland
There's a bit of kick ball, the highlight of which was Arendse and Keenan going for a proper contest in the air.
The South African wing came out on top, but that was a class battle between the two there.