Result: South Africa 37-20 Fiji
Kick-off: 1400 BST
LATEST ACTION (all times BST)
To get involved, text us on 81111 (UK users only) or contribute to 606
1554: "Well done Fiji. This has been the best ever World Cup. Rugby is really becoming a world sport now and the quality of play has been very good."
1551: "Hats off to a good Fiji team. South Africa need to spend this week wisely if they intend to advance any further in this tournament."
roomatthetop on 606
80 mins: TRY South Africa 37-20 Fiji
After a series of 5m scrums and forward drives, South Africa end the match with a try from fly-half Butch James, as he comes back on the angle against an exhausted Fiji defence.
Percy Montgomery kicks the conversion, and South Africa get a 17-point win which they barely deserve.
The final whistle goes and South Africa are through to the last four to face either Scotland or Argentina.
77 mins: There's a bad-tempered end to this classic encounter with Fourie du Preez and Schalk Burger both losing their rag as South Africa try to score a clinching try.
South Africa keep on taking 5m scrum after 5m scrum, and it has effectively ended the game.
73 mins: Terrible bad luck for Fiji as flanker Akapusi Qera gets a fingertip to Butch James's attempted drop-goal as he charges it down.
James's effort is always going wide of the posts and long, but Qera's touch means South Africa get a totally undeserved 5m scrum.
Schalk Burger bursts off the back of it, but knocks on in the act of scoring to give Fiji a glimmer of hope.
71 mins: Fiji are still attacking, but a knock-on from Seru Rabeni allows South Africa to clear through Butch James's booming touchfinder.
69 mins: TRY South Africa 30-20 Fiji
South Africa's forwards power their way through for a hard-earned try which should, in theory, win them the match. We've said that before though, haven't we?
A great kick from Fourie du Preez puts Fiji in trouble in their own 22, and their line-out is penalised for not straight.
South Africa take full advantage as just a few phases later, Juan Smith drives over for a desperately needed try.
Percy Montgomery kicks the converison, and South Africa are more than a converted try clear.
67 mins: This is yet another classic quarter-final. Fiji burst up the right flank with a Lomo-esque surge from Vilimoni Delasau, before the ball goes out to the other flank.
A debateable forward pass, unnoticed by the officials, makes its way to Ifereimi Rawaqa but a sublime tackle form JP Pietersen stops the lcok from touching down. One of the best tackles I have ever seen, and you cannot take your eyes off this for a second.
65 mins: Fiji hooker Sunia Koto drives forward to within millimetres of the try-line but greta Springbok defence just keeps him out. The next phase sees Seru rabeni knock-on at the base and the chance goes.
64 mins: Fiji, back to 15 men, are playing like men possessesed with a brilliant kick into the in-goal area forcing a 5m scrum after Francois Steyn and Schalk Burger are unable to escape into the field of play.
62 mins: PEN South Africa 23-20 Fiji
South Africa edge ahead again through Percy Montgomery's penalty after Fiji are forced into an infringement at the breakdown.
60 mins: There's a conference between all three officials after a harum-scarum few moments. South Africa have a dangerous attack but Sireli Bobo comes off his wing and knocks-on.
The Springboks are furious, but there are also high tackles and body checks going on. When the dust settles, we restart with a scrum and a stern talking to.
58 mins: TRY & CONVERSION South Africa 20-20 Fiji
Goodness gracious me, this is more than living up to the games of Saturday as Fiji score one of the tries of the tournament.
Full-back Norman Ligairi goes straight up the middle from the kick-off before being brought down on halfway. Mosese Raulini bursts up again, making 25m before slipping a perfectly timed pop-pass to Sireli Bobo, supporting on his shoulder to go through Jaque Fourie's tackle and score. Breathtaking.
Once again, Seremaia Bai scores the conversion and we're all level.
56 mins: TRY & CONVERSION South Africa 20-13 Fiji
An absolutely awesome piece of finishing from Fiji winger Vilimonu Delasau gets Fiji right back in the game.
Delasau seems to be going nowhere out wide on the touchline, but he looks up, chips over a half-asleep Percy Montgoemery and sprints into clear space where he gets a favourable bounce to touch down.
And fly-half Seremaia Bai curls in a lovely conversion. Game on.
50 mins: TRY & CONVERSION South Africa 20-6 Fiji
That could be game over as South Africa work a lovely try for winger JP Pietersen.
Classy handling from Butch James and Wikus van Heerden gets South Africa in behind, and the replacement flanker gifts Pietersen a simple score with a one-handed pass.
Percy Montgomery kicks the conversion and the gap is out to 14 points.
Meanwhile, Fiji's Seru Rabeni gets a YELLOW CARD for a nasty tackle on James earlier in the move. He goes in high and without much use of his arms, giving the referee little option.
48 mins: Fiji have started this half like a train, and a beautiful break from Seremai Bai slices South Africa open.
Mosese Raulini and Semisi Naevo exchange passes to keep the move going, but when the ball goes wide to Seru Rabeni, he knocks on under pressure.
45 mins: South Africa look ever so slightly rattled. Basic errors are coming into their game in quick succession.
Francois Steyn attempts a Hollywood pass out of contact and knocks-on for Villimoni Delasau to collect. He chips ahead but Bryan Habana is covering, but the winger gives JP Pietersen a horrible pass which goes over his head and bounces around.
Pietersen does well to hack into touch, but a couple of phases later another mistake comes as Fourie du Preez has a kick charged down.
43 mins: PEN South Africa 13-6 Fiji
A scrappy opening to the second half is summed up when Bryan Habana - potentially on the verge of a scintilating break up the middle - loses his footing and is pinged for holding on.
It gives Seremaia Bai the chance to kick an easy three-pointer and narrow the gap. Hello. Have we got a game on here?
41 mins: Fiji kick off to get the action back under way in Marseille.
1455: "13-3. Wasn't that the score last night too? And the match had developed in just the same way with only one side in it and the other playing like a park XV?
Naaaaaaaahhhhhhhhhhhhhhhhh!!! It can't happen twice..."
CS on 606
1450: "The game is in the bag. Fiji will give their all but in the last 20 the Boks will pull away and their set piece domination will be the difference.
"I'm not impressed by some of the Boks 'handling though - especially by your number eight, and you should give Francois Steyn the kicks!"
JB1973 on 606
40 mins: South Africa play out the remaining few seconds and fly-half Butch James boots the ball into touch to bring the first half to an end.
38 mins: Fiji number eight Sisa Koyamaiboile bursts down the left flank but is knocked into touch by a textbook tackle from Fourie du Preez.
34 mins: TRY South Africa 13-3 Fiji
Once again, it's South Africa's out-and-out power and size which is just too much for Fiji.
Some classic forward play from the Springboks sees their captain John Smit burrow his way over after his team-mates had skittled defenders out of the way with previous drives.
But Percy Montgomery's attempted conversion is a dreadful effort, ending up nearer the 22 than the posts.
32 mins: A fantastic double tackle from Vilimoni Delasau and Akapusi Qera on Schalk Burger sees the Springbok flanker lose possession with the tryline in sight.
JP Pietersen sends out a lovely pass for Burger to burst onto near the corner flag but Delasau and Qera knock the heavyweight flanker flying to save the day.
30 mins: The match is getting fairly scrappy at the moment. Knock-ons, poorly executed kicks, unsympathetic passing - it's all slowing down the spectacle.
28 mins: Referee Alan Lewis is starting to get a bit tetchy with South Africa. He gives another penalty against them for hands in the ruck, and tells their skipper John Smit to get the message through to his players quicksmart.
25 mins: PEN South Africa 8-3 Fiji
From the resulting line-out, Bakkies Botha brings down flanker Semisi Naevo in the air to give Fiji a very kickable penalty.
Stand-in fly-half Seremaia Bai lines up the kick and strokes it right through the middle of the posts to get his side on the scoreboard, and it is absolutely deserved.
23 mins: Fiji are contributing plenty to this match, with more classic back play stretching South Africa's defence. Kameli Raturou shrugs off two tackles and then a clever kick over the top from Mosese Raulini forces the mistake from JP Pietersen, who knocks the ball into touch.
22 mins: Another promising Fiji attack is stopped by a penalty against them for Akapusi Qera holding on to the ball on the floor.
The ball had been fizzing around with Kele Leawere and Sisa Koyamaibole both making good ground, but Qera opted to come back inside to heavy traffic and the chance is gone.
20 mins: Fiji get good ball off the top of the line-out and launch a backs move only for Seru Rabeni to telegraph his long pass.
South Africa's JP Pietersen intercepts, but Fiji full-back Norman Ligairi - the intended target of the pass - is alert enough to stop the speedy winger before he can sprint away for a length of the field score.
17 mins: Fiji win a penalty inside their own 22, but miss touch with their kick which is just meat and drink to South Africa.
A lovely show-and-go from Juan Smith opens Fiji up down the left, but he gets a bit too clever for his own good as he tries to offload under pressure and just coughs up the ball to Mosese Rauluni.
13 mins: TRY South Africa 8-0 Fiji
South Africa's power is just too much for Fiji as their forwards pound through phase after punishing phase to tie in the tacklers.
Juan Smit has two drives at the line as Fiji defend for all they are worth, but they finally run out of numbers as a lovely pass from Fourie du Preez puts centre Jaque Fourie in at the corner.
Percy Montgomery goes close with his conversion but it fades just outside the post.
10 mins: Percy Montgomery slightly dithers over a clearance kick and sees his effort charged down providing Fiji with a priceless scoring opportunity.
They turn the ball wide, but Seru Rabeni knocks on in midfield. A chance missed for Fiji.
7 mins: PEN South Africa 3-0 Fiji
A massive penalty from distance by the precocious Francois Steyn gives South Africa the lead.
He strokes the ball over from the halfway line with ease after Fiji infringe at the breakdown. That should settle any Springbok nerves.
5 mins: Fiji get their first chance to show what they can do in the backs with some loose ball snaffled up by Seru Rabeni. They sweep the ball into midfield but South Africa defend well.
3 mins: An ominous sign for Fiji as South Africa's pack demolish their counterparts in the first scrum of the match.
They rumble forward and force Fiji to concede a penalty for coming in at the side. It looks a fairly straightforward opener for Percy Montgomery, but he gets his angles slightly wrong and sees his effort hit the post and bounce away.
1 min: Butch James kicks off to get the match under way in Marseille.
Fiji collect and try to clear their lines but their captain Mosese Rauluni has his kick partially charged down, and he then knocks-on the loose ball to give South Africa a scrum.
1359: After two heartfelt anthems, we get Fiji's traditional Cibi - their version of the haka - which South Africa meet with respect.
1355: The two teams march out at a sun-bathed Stade Veldodrome to a great reception from the crowd. The Springboks are all wearing green tracksuit bottoms - surely they can't be a bit chilly in the heat of the south of France?
1350: "The Boks will mash Fiji, unlike us (I think he might mean Wales) they won't be missing tackles left, right and centre or playing it fast and loose.
"They'll boss the set pieces kick to the corners and win by 20 to 30 points. The Pumas will be a tougher prospect though."
JB1973 on 606
1347: Fiji fly-half Nicky Little is on the sidelines with the TV team at the Stade Velodrome, and it goes without saying that the former Saracens man is a massive loss for his side.
They have opted for centre Seremaia Bai in the number 10 shirt, and he will be someone that the South Africa back-row will be looking to get at early doors.
1342: So we're less than half an hour away from the start of the match that the Springboks are odds-on to win.
Fiji have already overachieved in the eyes of many just by reaching this stage of the tournament, but can they keep their World Cup journey going for another week?
1330: Afternoon all, we're back in Marseille for the third quarter-final of the Rugby World Cup as South Africa - newly installed as the bookmakers' favourites for the tournament - take on Fiji.
The match has a fair bit to live up to after Saturday's fantastic meetings between England and Australia and France and New Zealand.