Handre Pollard kicked winning penalty four minutes from time
South Africa will face England in Saturday's World Cup final
Wales will face New Zealand in third-place play-off on Friday
Wales lost George North and Tomas Francis to first-half injuries
South Africa's Damian de Allende scored first try after 57 minutes
Josh Adams went over in corner to level scores eight minutes later
Wales 6-9 South Africa
Tom Shanklin
Former Wales international on BBC Radio 5 Live
The wing is instinctive, you can’t just teach, Watkin is a decent player, but in terms of positioning it is going to be a challenge. He will need Halfpenny to help him. It will be a continuous bombardment.
HT: Wales 6-9 South Africa
Adrian Hadley
Former Wales international on BBC Radio Wales
Wales must be happy to go in only three points down at the end of this half. There's been a hell of a lot of kicking and Wales have looked better in attack, but as we've side, Wales need more of the ball.
Image source, AFPWales 6-9 South Africa
There's the gong. And that's the break.
It's tight, it's tense, and who knows which way this one will go?
Image source, AFPWales 6-9 South Africa
And George North won't be able to continue. He limps off to be replaced by Owen Watkin.
Wales 6-9 South Africa
Tom Shanklin
Former Wales international on BBC Radio 5 Live
He is hobbling like Derek Redmond at the Olympics. No way he can carry on. But it’s a semi-final of the World Cup, he has to try to carry on to half time and see if it’s OK. I hope Mr Miyagi is in the changing room to work on it!
Image source, Getty ImagesDan Biggar
Amid all that, Dan Biggar knocks over the penalty to bring Wales within three points again.
Image source, AFPWales 3-9 South Africa
Well, George North is back on his feet and taking his position, but he's limping like a kid who's taken a tumble after the stabilisers came off for the first time...
Wales 3-9 South Africa
Becky Grey
BBC Sport at International Stadium Yokohama
The crowd can’t quite believe what they’re seeing. There were a few cries of ‘you’re kidding me!’ when George North pulled up then.
Wales 3-9 South Africa
Matt Dawson
England World Cup winner on BBC Radio 5 Live
He is punching the ground in anger. Lame horse – gone. Goodness me, that is a nightmare.
Image source, AFPWales 3-9 South Africa
Advantage Wales after an off-the-ball hit on Aaron Wainwright, Dan Biggar slides left and kicks to the corner for George North to chase, but the winger has pulled up.
Hamstring? Doesn't look good for North and Wales. He's down, getting treatment.
Wales 3-9 South Africa
George North suddenly flies out of the traps only to have his ankles clipped.
Wales are into the South Africa 22...
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Gerard Boyd: Like the French game its SA that seem to have a bit of edge to their game not Wales
If Tony Pulis did rugby, this is what it would look like.
Chris Moore
Wales 3-9 South Africa
Five minutes to go in a tense and tactical first half.
Wales go through the phases, before bringing in Leigh Halfpenny but the full-back finds himself creeping backwards.
Gareth Davies goes high again, and Faf de Klerk responds in kind.
Wales 3-9 South Africa
Gareth Griffiths
BBC Sport Wales at International Stadium Yokohama
South Africa were never going to play anyway else. They are relying on their scrum and driving maul and the boot of Handre Pollard who kicks a third penalty.
It is not pretty but is very effective and with six replacement forwards on the South Africa bench it is not going to change.
Wales are kicking the ball a lot but must look at other ways to break down the South Africa defence.
Image source, AFPWales 3-9 South Africa
Matt Dawson
England World Cup winner on BBC Radio 5 Live
Never a great sign when the player is writhing on the ground, banging his hand on the ground because he is so angry with the pain.
Wales 3-9 South Africa
Adrian Hadley
Former Wales international on BBC Radio Wales
The good thing is we are more looking more likely to score a try. We've looked more dangerous with ball in hand and have got outside their defence a couple of times - we just need more of the ball.
Image source, Getty ImagesWales 3-9 South Africa
Prop Tomos Francis is down. He delivered a big hit on Duane Vermeulen but was hurt doing so and is going to have to be replaced - Dillon Lewis is coming on in his place.
Image source, AFPWales 3-9 South Africa
Tom Shanklin
Former Wales international on BBC Radio 5 Live
This is key - your discipline has to be spot on. If you think its 50-50, you shouldn’t go anywhere near it.
Handre Pollard
And he makes no mistake.
3/3 for the Springbok fly-half so far. South Africa's lead stretches to six.
Image source, Getty ImagesWales 3-6 South Africa
South Africa get shirts around the ball and look to boulder forward with their well-renowned maul. Ken Owens comes crashing in at the side and is penalised.
Handre Pollard will have a dig from wide out...