We know that England and Australia are into the semi-finals from Group 1. Pakistan are guaranteed to progress from Group 2 but Sunday will help us move closer to finding out who rounds off the four.
New Zealand and Afghanistan meet at 10:00 GMT and if the Kiwis win they are through. If Afghanistan win it opens the door for India on Monday.
More from Mark Wood on Sky Sports: "You never want to lose and we're not used to losing but when we do we normally bounce back well. It is just a reminder that we still have stuff to work on.
"We are used to getting wickets in the powerplay and it just didn't happen tonight. Rassie van der Dussen and Aiden Markram played well too and it sounds like excuses but we were maybe off the pace and they were just at it."
Post update
South Africa captain Temba Bavuma: "The win was important, but a bittersweet ending for us.
"We achieved what we wanted to do in terms of winning, but didn't win well enough. We gave our all with the bat and with the ball.
"At the start of the tournament net run-rate wasn't a big factor, we felt we wanted to win the game. Tough to bring NRR into effect in our last game, especially against a side like England. But very proud of the side and think there's a lot we can take away from this.
"We've got to build on the confidence and momentum, this will give us experience and learnings we can take from this World Cup going forward."
Post update
More from Eoin Morgan: "We have dealt with a lot of injuries throughout and before the tournament with Ben Stokes, Sam Curran and Jofra Archer all out. Jason Roy will be assessed tomorrow but we have a lot of depth and that is something we have tried to build over the last couple of years.
"We are very happy to get through. Finals are about expressing yourself and we'll look to enjoy them as much as we can."
Post update
England captain Eoin Morgan: "It was a really good wicket. South Africa batted really well and we were probably a little bit off in the field. We kept them to around a par score, but we thought we were right in the game with the dew coming into the game. The injury to Jason Roy obviously hurt us but we felt we were right in the game throughout.
"Every game tests us in different ways. The biggest test has probably been against Sri Lanka in Sharjah and Jos Buttler got us out of a hole and then one of our bowlers went down and we got through that in flying colours. Today was a different wicket and our batters couldn't have been more expressive and bowlers had to find a defensive mode. I would say Sri Lanka was probably a bit tougher."
Post update
Here is Liam Livingstone pumping Kagiso Rabada around the ground - and out of it - for you to enjoy.
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England needed 14 from the final over with Eoin Morgan and Chris Woakes at the crease.
Kagiso Rabada took a hat-trick to wrap the game up for South Africa.
He came back well from being pumped for three sixes in three balls by Liam Livingstone in his previous over.
Rev Aidan Watson: If that injury is bad Roy should be dropped. No way we can have a guy on one leg in the semi-final.
Mark Burt: Bad day at the office for England but still top the group so no damage done except to pride. A few negatives though, Roy is a huge loss, another failure for Bairstow and Woakes and Wood very poor with the ball. Could easily see Tom Curran play in the semi.
Post update
Mark Wood on Sky Sports: "It is nice to be back but it is nicer when you win. It brings us back down to earth a little bit but it is good. It gives us something to work on.
"There is still a little bit of pain there but I trained well in the last two days and I felt like I could do the job. Today didn't go quite as I wanted though.
"When you make yourself available to play you've still got to deliver. They played well but the thing that disappointed me was that I wasn't able to get many dot balls. They ticked me over and then picked up a boundary and that is 10 or 12 an over. I need to work on my first and last ball of the over.
"I got a bit of a telling off from Morgy for that one that I kicked!"
Post update
Carlos Brathwaite
West Indies all-rounder on BBC Test Match Special
With the quality and depth England have they don't need to carry Jason Roy.
It's unfortunate for him but England are trying to win a tournament so you cannot be sentimental.
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Phil Tufnell
Former England spinner on BBC Test Match Special
England looked a bit rattled at the back end of the game. Tymal Mills was a miss there and Jason Roy is going to be a big miss with the bat up front.
So there will be a few concerns. They were cruising and now a few things have popped up, but that's the nature of the game.
Post update
Man of the match Rassie van der Dussen: "We knew we had to get a good score on the board and we've asked so much of the bowlers in this tournament and we probably asked too much of them today. The batting did well today and it was still a good performance bating a good side.
"If you get in you are a lot more effective then a new guy coming in. We saw that towards the end of the England innings so me and Aiden [Makram] knew we had to stay in till the end.
"It has been difficult because the three venues are so different. It has been a challenge for the batting units and probably the ones to adapt quickest have been the most successful."
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Liam Livingstone is a serious player.
Enjoy his three sixes in a row, including the biggest of the tournament so far.
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Jason Roy is waiting for the South Africa players just near the boundary.
He is on crutches.
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Phil Tufnell
Former England spinner on BBC Test Match Special
An entertaining high-scoring game.
I think South Africa batted beautifully and although their bowling was a bit off England will think they gave that chase a pretty good go.
Post update
No texts asking for xxx to be dropped please!
Losses are common place in T20 cricket. It is a helter skelter format.
How's stat?!
Andy Zaltzman
BBC Test Match Special statistician
All previous winners of the T20 World Cup have lost at least one game on the way.
BreakingSouth Africa win by 10 wins
England suffer a first lost but they are safely through to the semi-finals.
Australia join them from Group 1.
Eng 178-8
Need 12 from 1 ball
Mark Wood pulls out to deep square leg for a single.
Live Reporting
Thomas Mallows and Callum Matthews
All times stated are UK
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Time for us to call it a day.
I'll leave you with Matt Henry's report of England's 10-run defeat to South Africa to end their perfect start to the tournament. There are also some of the best moments for you to enjoy again.
We know that England and Australia are into the semi-finals from Group 1. Pakistan are guaranteed to progress from Group 2 but Sunday will help us move closer to finding out who rounds off the four.
New Zealand and Afghanistan meet at 10:00 GMT and if the Kiwis win they are through. If Afghanistan win it opens the door for India on Monday.
We'll see you then and there are some Women's Big Bash commentaries overnight too!
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More from Mark Wood on Sky Sports: "You never want to lose and we're not used to losing but when we do we normally bounce back well. It is just a reminder that we still have stuff to work on.
"We are used to getting wickets in the powerplay and it just didn't happen tonight. Rassie van der Dussen and Aiden Markram played well too and it sounds like excuses but we were maybe off the pace and they were just at it."
Post update
South Africa captain Temba Bavuma: "The win was important, but a bittersweet ending for us.
"We achieved what we wanted to do in terms of winning, but didn't win well enough. We gave our all with the bat and with the ball.
"At the start of the tournament net run-rate wasn't a big factor, we felt we wanted to win the game. Tough to bring NRR into effect in our last game, especially against a side like England. But very proud of the side and think there's a lot we can take away from this.
"We've got to build on the confidence and momentum, this will give us experience and learnings we can take from this World Cup going forward."
Post update
More from Eoin Morgan: "We have dealt with a lot of injuries throughout and before the tournament with Ben Stokes, Sam Curran and Jofra Archer all out. Jason Roy will be assessed tomorrow but we have a lot of depth and that is something we have tried to build over the last couple of years.
"We are very happy to get through. Finals are about expressing yourself and we'll look to enjoy them as much as we can."
Post update
England captain Eoin Morgan: "It was a really good wicket. South Africa batted really well and we were probably a little bit off in the field. We kept them to around a par score, but we thought we were right in the game with the dew coming into the game. The injury to Jason Roy obviously hurt us but we felt we were right in the game throughout.
"Every game tests us in different ways. The biggest test has probably been against Sri Lanka in Sharjah and Jos Buttler got us out of a hole and then one of our bowlers went down and we got through that in flying colours. Today was a different wicket and our batters couldn't have been more expressive and bowlers had to find a defensive mode. I would say Sri Lanka was probably a bit tougher."
Post update
Here is Liam Livingstone pumping Kagiso Rabada around the ground - and out of it - for you to enjoy.
Video content
Post update
England needed 14 from the final over with Eoin Morgan and Chris Woakes at the crease.
Kagiso Rabada took a hat-trick to wrap the game up for South Africa.
He came back well from being pumped for three sixes in three balls by Liam Livingstone in his previous over.
Video content
Post update
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Rev Aidan Watson: If that injury is bad Roy should be dropped. No way we can have a guy on one leg in the semi-final.
Mark Burt: Bad day at the office for England but still top the group so no damage done except to pride. A few negatives though, Roy is a huge loss, another failure for Bairstow and Woakes and Wood very poor with the ball. Could easily see Tom Curran play in the semi.
Post update
Mark Wood on Sky Sports: "It is nice to be back but it is nicer when you win. It brings us back down to earth a little bit but it is good. It gives us something to work on.
"There is still a little bit of pain there but I trained well in the last two days and I felt like I could do the job. Today didn't go quite as I wanted though.
"When you make yourself available to play you've still got to deliver. They played well but the thing that disappointed me was that I wasn't able to get many dot balls. They ticked me over and then picked up a boundary and that is 10 or 12 an over. I need to work on my first and last ball of the over.
"I got a bit of a telling off from Morgy for that one that I kicked!"
Post update
Carlos Brathwaite
West Indies all-rounder on BBC Test Match Special
With the quality and depth England have they don't need to carry Jason Roy.
It's unfortunate for him but England are trying to win a tournament so you cannot be sentimental.
Video content
Post update
Phil Tufnell
Former England spinner on BBC Test Match Special
England looked a bit rattled at the back end of the game. Tymal Mills was a miss there and Jason Roy is going to be a big miss with the bat up front.
So there will be a few concerns. They were cruising and now a few things have popped up, but that's the nature of the game.
Post update
Man of the match Rassie van der Dussen: "We knew we had to get a good score on the board and we've asked so much of the bowlers in this tournament and we probably asked too much of them today. The batting did well today and it was still a good performance bating a good side.
"If you get in you are a lot more effective then a new guy coming in. We saw that towards the end of the England innings so me and Aiden [Makram] knew we had to stay in till the end.
"It has been difficult because the three venues are so different. It has been a challenge for the batting units and probably the ones to adapt quickest have been the most successful."
Video content
Post update
Liam Livingstone is a serious player.
Enjoy his three sixes in a row, including the biggest of the tournament so far.
Video content
Post update
Jason Roy is waiting for the South Africa players just near the boundary.
He is on crutches.
Video content
Post update
Phil Tufnell
Former England spinner on BBC Test Match Special
An entertaining high-scoring game.
I think South Africa batted beautifully and although their bowling was a bit off England will think they gave that chase a pretty good go.
Post update
No texts asking for xxx to be dropped please!
Losses are common place in T20 cricket. It is a helter skelter format.
How's stat?!
Andy Zaltzman
BBC Test Match Special statistician
All previous winners of the T20 World Cup have lost at least one game on the way.
BreakingSouth Africa win by 10 wins
England suffer a first lost but they are safely through to the semi-finals.
Australia join them from Group 1.
Eng 178-8
Need 12 from 1 ball
Mark Wood pulls out to deep square leg for a single.