Former England winger Chris Waddle
BBC Radio 5 live

"When you're chasing the game you have to give it a go and that's what South Korea did.

"They upped the tempo after half-time, Algeria sat deep, South Korea got one back, then had one headed off the line but then Algeria go and score. It's tough but they're not out of the World Cup yet."

You can listen to BBC Radio 5 live's commentary by clicking on the Live Coverage tab at the top of this page.

Ouch. Algeria captain Madjid Bougherra is booked for a crunching challenge on Son Heung-min. The Africans are showing little sign of easing up. They're challenging for absolutely everything. Can they get five?

Ashic Mahtab:, external Love it when two lesser teams produce a more interesting match than the big guns manage.

Kenneth Gyang:, external An African team has finally scored four goals in a World Cup match. Algeria. Legends.

Ross Evans:, external Porto Alegre the place to be this World Cup. 13 goals in 3 matches!

Former England winger Chris Waddle
BBC Radio 5 live

"It's a much better second half, there are actually two teams playing now - credit to South Korea for the way they started the half. But the first time we've seen Algeria go forward since half-time they score and that has got to be South Korea finished."

Image source, Getty Images

What a time to score your first international goal!

Algeria restore their three-goal cushion with a super team move which is finished off by Yacine Brahimi's low composed finish from 10 yards. South Korea had been threatening to get back into this. They have it all to do now.

Paula Chapman:, external This game is actually shaping up to be a bit of a cracker. It's all South Korea now. Is the comeback of the World Cup on?

So close to a second for South Korea!

Ki Sung-yueng lets fly from outside the area forcing Rais Mbolhi into a flying save. This is another terrific game.

Image source, Reuters

Striker Kim Seung-gyu has come on for Park Chu-young. South Korea can smell another goal.

Jamie in Wakefield via text: How do you say hairdryer treatment in Korean? Because it looks like they might have had that at half time. Game on.

Former England winger Chris Waddle
BBC Radio 5 live

"This is a vast improvement on what we saw from South Korea in the first half.

"If in the first 45 they looked like a Sunday league team then this half they look like a Premier League team. Algeria are feeling the pace, they are not the same side we saw in the first half, when they were in your face and hustling. Now they have dropped off.

"If South Korea can get a second goal this really will be game on."

Lee Yong is booked for a cynical challenge on Djamel Mesbah. South Korea have come alive after a woeful first half display. Still plenty of time for themselves back into this.

Danny C:, external A goal! That's the least we deserve here in Korea for waking up at 4am to watch that first-half rubbish!

Former England winger Chris Waddle
BBC Radio 5 live

"It's a wonderful goal, again a long ball up in to the box and the two Algeria centre-backs should deal with that given their size and strength, but they're not the most mobile. The ball hits Son Heung-min on the back, he controls it and now it is game on."

You can listen to BBC Radio 5 live's commentary by clicking on the Live Coverage tab at the top of this page.

Image source, Getty Images

Surely they can't, can they? South Korea claw one back with their first shot on target as Bayer Leverkusen's Son Heung-min produces a smart finish through the legs of the keeper after a mistake by Madjid Bougherra.

No African team has ever scored four or more goals in a World Cup game. Algeria are well on their way. South Korea are trying to pass their way back into this but they still cannot threaten the Algeria keeper.

No changes for South Korea at the interval as we get back under way.

Algeria lead 3-0 at half-time in a World Cup match for the second time in their history - in 1982 they led Chile 3-0 before winning 3-2.

Inaam on text: I'm sure Paul Scholes said to England to adopt a method like Liverpool. I think Algeria have listened more.

As it stands, Algeria are heading second, above Russia and South Korea, in Group H. Algeria's final group game is against Russia on 26 June, while South Korea face leaders Belgium.

Algeria had scored just two goals in their previous 11 hours and 25 minutes of World Cup action before this game.