Meanwhile, it is more bad news for Scotland.

Scrum-half Ali Price will miss the rest of the tournament after being injured in their defeat by Ireland on Sunday.

The Scots have already lost influential back-row Hamish Marshall to injury.

Some news from around the World Cup as we wait for the second half in Japan.

England boss Eddie Jones has made 10 changes for the their second pool game, against the USA on Thursday.

Click below to see the full team, as England deal with a quick turnaround following their win over Tonga on Sunday.

Here is the tale of the first half in stat form.

It's been fairly even, and the score reflects it.

Image source, Opta

Natasha Hunt
England World Cup winning scrum-half on BBC Radio 5 Live Sports Extra

Image source, Getty Images

The amount of passion and ferocity going in to this first-half is brilliant.

What a half of rugby!

Geoff Kay: Manuia le taeao (good morning in Samoan I believe) Being a Falcons fan and having a mate who’s a Bristol fan, I can only support one team here.

Ohh and the small factor of getting the Samoans in the office sweep.

LMW: What on earth is in these Russian heads? The small scrum-half get walloped by a half tonne Samoan and yet it's the Samoan that ends up worse. These Russians are plucked from the wilderness in deep dark Siberia!

Either way, the Samoans need to be more disciplined in the second half.

Russia can't make the most of the final attacking opportunity, as the ball is spilled in contact about three metres from the Samoa line.

That brings half-time.

It's been low-scoring but fairly engrossing first half in Kumagaya.

Russia lead at half-time for the first time in their Rugby World Cup history.

Image source, Getty Images

Two big let-offs for Samoa.

First Tim Nanai-Williams spills a kick over the top inside his own 22, but then Vladimir Ostroushko can't get on the end of it.

Samoa pass the ball back into their own 22, and Ostroushko charges down the kick again, but can't touch down.

Either way we come back to a Russian 5-metre scrum for the knock-on from Nanai-Williams.

Image source, Getty Images

The game gets a bit scrappy, and a couple of knock-ons gives the Russians a scrum about five metres inside the Samoa half.

The first scrum breaks down and centre Rey Lee-Lo is back.

Samoa are back up to 14. Russia still have a chance to take advantage - but they'll need to be quick about it.

Tusi Pisi again misses his attempt at the sticks.

He pulls this one just to the right of the posts, giving Russia a 22 drop-out.

Rey Lee-Lo will be back soon for Samoa.

The Bears are not handling their advantage too well.

They kick the ball back to Samoa, who take their time over their line-out and then enjoy a few phases of possession.

Russia then give away a penalty, and Tusi Pisi will eat up every second he is allowed before kicking at goal from just inside the Bears half.

Natasha Hunt
England World Cup winning scrum-half on BBC Radio 5 Live Sports Extra

Image source, Getty Images

You've got all the time in the world to drop your body height and hit a little bit lower.

Motu Matu'u is very fortunate that he's got a yellow and not a red card.

Russia don't make the most of their first attacking opportunity.

They spread the ball wide to the left but a loose pass from Yury Kushnarev sends the ball to the feet of Vasily Artemyev.

There's a knock-on and Samoa get the scrum about five metres inside their own half.

Stanislav Selskii is back on at hooker for Russia, and Samoa have had to bring on Ray Niuia while Motu Matu'u is in the bin.

Motu Matu'u gets a yellow for that attempted tackle.

Samoa are down to 13 for about eight minutes.

The hooker might need a head injury assessment too.

Natasha Hunt
England World Cup winning scrum-half on BBC Radio 5 Live Sports Extra

Image source, AFP

As a referee it's so difficult in the heat of the moment but Rey Lee-Lo is a lucky man.

It worked in his favor that the Russian captain got up straight to his feet, had he stayed down then that potentially would have been looked at differently.

Another huge hit from a Samoan on Vasily Artemyev.

But this time hooker Motu Matu'u - again leading with the shoulder - has done himself damage.

He's hurt himself despite flying in for the tackle.

We'll have another review. There could be another card for the Pacific Islanders.

Image source, Getty Images

After a long consultation, Rey Lee-Lo gets a yellow card for that challenge.

He might be slightly lucky he's not got a red there.

Can Russia take advantage of a man advantage before the break?

Natasha Hunt
England World Cup winning scrum-half on BBC Radio 5 Live Sports Extra

This game is super tight but Russia just deserve the lead.

We've really got a game on our hands.

We are going to look at a tackle from Samoa centre Rey Lee-Lo on Russian skipper Vasily Artemyev.

It is high - Lee Lo's shoulder cataches Artemyev's head, but the Russian skipper dips in the tackle slightly.

It's a big call for Romain Poite to make.

Image source, Getty Images

Yury Kushnarev makes no mistake again from a central position, and Russia have the lead despite barely entering the Samoan 22 all game.

Russia have the ball and are going through the phases, but it is slow ball after a really good line break from scrum-half Vasily Dorofeev.

A good hit from centre Ray Lee-Lo pushes Vasily Artemyev back.

Then Russia get another penalty at the break down, and a chance to take the lead.