Reaction as Boks reach last eight

1. Pool B FT: South Africa 64-0 United States
2. De Allende, penalty, Habana 3, Du Plessis, Louw 2, Kriel, Mvovo tries
3. South Africa into quarter-finals
4. Springboks suffered shock opening defeat by Japan
5. Listen to 5 live sports extra commentary in live coverage tab

Goodbye

So South Africa steamroll their way into the quarter-finals as Pool B winners, teeing up a humdinger against either Australia or Wales at Twickenham a week on Saturday.

Anyone betting against that being the day when Bryan Habana becomes the World Cup's outright leading try-scorer? Me neither.

Time for me to nip to the canteen before we sit back down for Namibia v Georgia at 20:00 BST. Join us again then.

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Stats of the day

• South Africa kept their opposition scoreless for the fourth time in a World Cup game, more than any other team in the competition’s history
• This was the biggest winning margin in this year’s World Cup and the first time a team has been kept scoreless in 2015
• This game saw the USA’s biggest defeat in World Cup history and their sixth biggest overall

Full-time

Positives for USA fans? Hmmm, well they did compete in the opening 40 minutes. But once South Africa received a half-time rollicking from coach Heyneke Meyer, the under-strength Americans could not cope with their nasty streak. Looks like the wooden spoon for them - unless their first-choice XV can nab that cherished win against Japan on Sunday.

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Maybe Jonah Lomu is upset. I can tell you he has not yet Tweeted about Habana being on the brink of breaking his record. Or maybe he is still snoozing down under.

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Bryan Habana will be more than happy with his evening's work - the South African wing bagged a hat-trick to move level with Jonah Lomu at the top of the World Cup try tree. But it could have been even better had he not spilled the ball with the line at his mercy in the final quarter of an hour. At least Jonah will be happy. We don't want to upset him.

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BBC Sport

How did Japan do it?

When you watch the way South Africa dominate teams and put teams to the sword, it makes Japan's victory over them earlier in the tournament even more extraordinary."

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South Africa have, of course, now qualified for the last-eight with that ruthless victory. And that means the second quarter-final spot is a straight scrap between Scotland and Japan. It is simple enough for Scotland - beat Samoa and they are through to the knockout phase.

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Full-time

All over! Impressive display by the Springboks, particularly after the break when they really stuck their foot on the gas. That Japan defeat really has been consigned to World Cup history.

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Converted try - South Africa 64-0 USA

Heartbreak for the USA! Just as they looked to be on the verge of grabbing a late try, South Africa pull the rug from under them. The Springboks race clear on the counter, Lwazi Mvovo showing neat footwork that Steven Pienaar would be proud of, before scooping up to dive over.

Reuters

South Africa 57-0 USA

One more chance for the Americans? The London crowd are desperate for the USA to cross for a consolation try and there's a huge cheer as Brett Thompson breaks the Springbok line...

South Africa 57-0 USA

Bryan Habana is desperate to knock the mighty Jonah Lomu off his World Cup try-scoring perch. The South African flyer almost has another sniff down the right flank, but juggles the ball and play is hauled back by the referee. Final play...

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South Africa 57-0 USA

Damage limitation now for the Americans. If they hold out in the next five minutes then they won't suffer their heaviest World Cup defeat. That came in 2011 when they lost 67-5 to Australia. Small consolations and all that.

Get involved

Nathan Titus

nathanstitus

Maybe the best thing that happened to @Springboks was that loss to Japan... That loss at #RWC2015 is out of the way. #SAvsUSA #bbcrugby

5:19 p.m. - 7 October 2015

Boks switched on

It's a feature of South Africa rugby they do the switch move better than any other team in world rugby. It seems to be a forgotten art over here."

Try - South Africa 57-0 USA

Too easy. Far too easy. Although it's easy to say that when you're not wearing you're not a weary American faced with a Springbok charging towards you. Jesse Kriel joins the try-scoring party, arcing through the American line, nipping in between a couple of half-hearted dives and bounding over. Another missed conversion from Morne Steyn though, he shakes his head as he trots back off to the halfway line.

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Try - South Africa 52-0 USA

The tries are arriving quicker than Tube trains at Stratford station now. Another driving maul ends in Francois Louw ducking out and over the USA line. That's his second try of the evening.

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South Africa 47-0 USA

"Get the ball out to Bryan!" The South African tactics are not rocket science. The Springboks are desperate for Habana to stick his name in the World Cup history books now. They work the ball out wide, looking for the winger who - almost unbelievably - mishandles with the line at his mercy. He grins. But he doesn't find it funny really.

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Habana joins Lomu

BBC Sport

'Wonderful Habana'

Habana just retains this wonderful enthusiasm. Whenever he scores a try you think it's his first because there is always a smile on his face."

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Try - South Africa 47-0 USA

He's in again! South Africa speedster Bryan Habana polishes off another chance quicker than I finish my dinner. Habana dashes along the touchline to cross for a second-half hat-trick - moving him level with Jonah Lomu as the World Cup's leading try-scorer. Big Jonah must know his reign is almost over...

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Converted try - South Africa 40-0 USA

Get ready to rip up that record book - it could be about to be broken! Bryan Habana races through to move one behind Jonah Lomu as the World Cup's record try-scorer. And you wouldn't bet against him breaking it against a fatigued USA side...

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Replacement

A trio of changes for South Africa as we approach the hour mark. Saracens's ever-smiling hooker Schalke Brits replaces Bismarck du Plessis, while Morne Steyn comes on for Handre Pollard. And the third switch is also in the front row, Tendai Mtawarira trudging off for Trevor Nyakane.

South Africa 33-0 USA

American legs are heavy and their minds are weary. They have little more than half an hour to avoid becoming the first side to be nilled at this tournament.

Reuters

'No mercy'

If there's one team that shows no mercy when they play it's South Africa. That was all about pace and power. I hope this doesn't become a rout. The Eagles have played very well, but South Africa are playing free-flowing rugby."

Converted try - South Africa 33-0 USA

South Africa's driving maul is a thing of beauty. Dark blue shirts are ploughed out of the way by the Springbok juggernaut, with Francois Louw reaching out for the line. Handre Pollard, after that earlier blip with his boot, adds the extras.

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Replacement

Schalk Burger, whose rampaging run set the platform for that bonus-point try, is given a breather. The 32-year-old back-rower is replaced by Willem Alberts and is given a rapturous round of applause.

'Relentless'

You sensed this second half was going to be 30 minutes too much for the United States. When it is constant driving, like South Africa can do... it's just relentless."

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Try - South Africa 26-0 USA

The Americans simply cannot cope with the South African scrum. You can almost feel the pain of the American props as they face another set-piece just five metres from their own line. Springboks number eight Duane Vermeulen spins out of the back, is clawed back juts short of the line, only for Bismarck du Plessis to pick up the pieces and steamroller over the line from close range.

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South Africa's lineout has not quite been impeccable today, but they do win a set-piece before Schalke Burger bursts through the USA line. Burger feeds the supporting Damien de Allende, who is held up as the Americans scramble back. The danger is not over though...

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'Try machine'

Boy, Habana is a try-scoring machine. It was a pretty good dive. I'd give him 9.5 out of 10 for artistic effort."

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Converted try - South Africa 21-0 USA

The question is, is Habana onside when Fourie du Preez kicks forward? The officials believe so, meaning Habana is now two behind Jonah Lomu's World Cup try scoring record. The South Africa wing races onto Du Preez's kick before swallow-diving over the USA line.

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Try review

Barely a minute has ticked by, and Bryan Habana races through to score. Or has he? Over to the TMO....

Kick-off

Right then, we're ready to rumble again. The Springboks restart the action...

Half-time

Plenty for the Springboks to discuss as they take a gulp of water in the dressing room at half-time. I say discuss...coach Heyneke Meyer is dishing out a serious lecture. Lots of expressive hands gesture as he tears into his players who are looking straight down at the floor. While they are yet to fire on all cylinders going forward, the main thing is they are winning - any victory will put them in the last eight remember.

Half-time

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Half-time

BBC Sport

'Tired South Africa'

"That was a great first half, you have to hand it to the resilience of the United States defence. There are some tired bodies out there in the South Africa team."

Half-time

Referee Pascal Gauzere blows his whistle as South Africa head back down the Olympic Stadium tunnel with a comfortable lead. Steady if not spectacular from the Springboks. Little guile from the backline means the Americans have not been sliced open as much as they would have feared.

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South Africa 14-0 USA

Can the USA make this count? They'd be delighted with a 14-7 deficit at the break, I'm sure. Nope, the South African defence remain firm.