Mitch H Mansfield:, external Thomas Muller's unique characteristics and skill set make him my favourite player in world football.

B19 UMR:, external Would love to see Algeria cause an upset against the Germans. Judging by what we've seen so far at this World Cup anything is possible.

BBC Radio 5 live

German football journalist Raphael Honigstein: "Germany came here with the very clear aim of winning the World Cup. The German FA and the German public might be prepared to give them a pass if they lose to Brazil in a semi-final, or Argentina, but anything less and there will be serious questions.

Image source, Epa

"This is a side that is expected to win things. Maybe not a World Cup in Brazil but losing to Algeria in the last 16? I don't think Joachim Low would survive that."

That German team, boasting seven Bayern Munich men, looks very strong indeed. But Algeria will be up for this, they showed in the group that they can score goals, albeit against weaker opposition.

An early one for the Desert Foxes and we may be in for a cracker. The last-16 matchups have all come to life late on so far - can this one be a wire-to-wire thriller?

John: Justice would be served if Algeria beat Germany this evening. 32 years late but it would be sweet. And then they would play France! What a World Cup for Algeria if they beat France as well and settle another old score!

Mark Lawrenson
Football Analyst

Image source, Getty Images

"Germany have got such a strong squad, they can bring people on to change the direction of a game.

"Algeria have done fantastically well to get this far - you saw that in their celebrations when they got the draw they needed with Russia to progress to the knockout stage for the first time.

"I cannot see them beating Germany but they will have a go and they will try to play as well - credit to them that they did not kick their way out of their group or park the bus."

Lawro's prediction: 2-0

BBC Radio 5 live

German football journalist Raphael Honigstein: "A lot of the negative stereotypes about the German national team started because of 1982. The arrogance they showed, the complete disregard to the public, and the complete lack of contrition from the players after the game really did not help matters. The Spanish newspaper Marca famously ran the match report in their crime section.

"The Germany teams of Jurgen Klinsmann and Joachim Low were the first to really escape that shadow.

"Low has said 1982 was a long time ago, that it was nothing to do with us. I think there are only two players in the squad who were alive, just, in Miroslav Klose and Roman Weidenfeller. But Low's frustration also stems from the fact that this is a very different Germany team.

"The bigger problem for him is instilling that fear that Algeria could harm them. You can see from the changes he has made this is a match he is taking very seriously. This Germany team doesn't go into games with a sense of entitlement anymore."

Germany (and West Germany) boast a remarkable record in the World Cup. It may be 24 years since they last won the tournament but they always reach at least the last eight.

Their last three World Cups have seen them finish third, third and second...

Image source, Epa

Algeria coach Vahid Halilhodzic seems like quite an angry man in the build up to tonight's game.

As well as raging over the 'Disgrace of Gijon', he also got heated in Sunday's news conference and refused to divulge which of his Muslim players are observing Ramadan, the 30-day dawn-to-dusk fast which began on Sunday.

"This is a private matter and when you ask this you lack respect and ethics," said the Bosnian.

"The players will do as they wish and I would like to stop this controversy."

So what's at stake tonight? Only a coveted place in the World Cup quarter-finals.

And the winners of tonight's showdown in Porto Alegre know the identity of their next opponents - France.

Les Bleus scored twice in the final 11 minutes through Paul Pogba and Joseph Yobo's own goal to edge past last-16 opponents Nigeria.

Image source, AP

France v Germany - tasty. France v Algeria - even tastier.

Former England winger Chris Waddle
BBC Radio 5 live in Porto Alegre

"Algeria look like they are set up to get men behind the ball and spring forward when they can. I expect Germany to have a lot of possession but they need to be clever enough to break them down and not get caught on the counter."

Five changes for Algeria to the starting XI which lined up against Russia in their final Group H game. Here are the names of the 11 men tasked with seeing off the Germans...

Algeria starting XI: Mbolhi, Ghoulam, Belkalem, Halliche (c), Lacen, Feghouli, Slimani, Soudani, Taider, Mandi, Mostefa.

Estadio Beira-Rio, Porto Alegre

Image source, Getty Images

Capacity: 48,849.

Opened: 1969, but reopened in February 2014.

Altitude: 47m (154ft).

Climate: It can get down to a chilly 10C at Porte Alegre in June and July with highs only around 19C.

Time Zone: GMT -3 hours.

Approximate distance from Rio: 982 miles.

Where is it?: The furthest south of the host cities, Porto Alegre sits on a huge freshwater lagoon called Lagoa dos Patos (Lagoon of the Ducks), which is 174 miles long.

Fixtures: 15 June, France 3-0 Honduras; 18 June, Australia 2-3 Netherlands; 22 June, South Korea 2-4 Algeria; 25 June, Nigeria 2-3 Argentina; 30 June, Germany v Algeria, 21:00.

Background: Originally built in 1969, and known as the Estadio Jose Pinheiro Borda, the stadium has been extensively revamped for the World Cup, with stands moved closer to the pitch and covered by a roof to shield fans from the elements.

Although the stadium opened in February, temporary facilities - such as media facilities and hospitality areas - had not been finished. They will only be completed at the last minute following wrangling over whether the cost should be covered by the public purse or the stadium's owners, top-flight side Internacional.

BBC Sport's David Ornstein at Estadio Beira-Rio

"Germany captain Philipp Lahm described the north Africans as "unpleasant to play against" and a side who "prefer to play a foul than to lose the ball".

"Asked how great the pressure is on his team to win this tournament, Lahm added: "Germany is a three-time World Cup winner and there aren't that many teams that have won so many titles. I think we have great potential - whether this is enough for this tournament, we will see."

BBC Radio 5 live

BBC Radio 5 live has full match commentary of the 21:00 BST kick-off between Germany and Algeria, with build-up from 20:30.

And later you can watch highlights from that match and the earlier kick-off between France and Nigeria on Match of the Day from 00:05 on BBC One.

How to follow the World Cup across BBC TV, radio and online.

Porto Alegre is doing its best Port Talbot impression this evening.

Our friends from BBC weather tell us that "a low pressure system positioned just off the coast of southeast Brazil will make for a cloudy skies in Porto Alegre for this evening's World Cup tie between Germany and Algeria.

"There will also be the risk of a few showers, with a moderate westerly wind and temperatures of around 15C."

Chilly...

Will we see a World Cup record this evening? Germany striker Miroslav Klose is level on 15 World Cup goals with Brazilian legend Ronaldo and may fancy a late dash at the Algeria defence to go onto 16.

Unfortunately for record-breaking lovers out there, he only seems to get about 20 minutes tops from the bench these days...

Phoenixville:, external I would guess there's no more big surprises left in the tournament as the big teams advance, and I can't see Algeria causing one.

Cardiff Confucius:, external I know the players should put 1982 behind them, but I'm pretty convinced that Miroslav Klose played that day...

Image source, Reuters

So a big night for German full-back Shkodran Mustafi, who starts at right-back. He wasn't even in the squad until Dortmund winger Marco Reus hurt his ankle in a pre-tournament friendly.

The 22-year-old joined Everton when he was 17 and made his debut replacing the living legend that is Tony Hibbert in a Europa League game.

He wisely clocked on that life on Merseyside wouldn't get any better, and left to join Sampdoria in 2012 on a free transfer.

BBC Sport's David Ornstein in Porto Alegre

"It's a wet, cold and windy afternoon in the southern city of Porto Alegre, but with plenty of noisy Algerians in town and a substantial Germany community based here for many years, it's likely to be a red hot atmosphere inside Estadio Beira-Rio come kick-off.

"Fortunately, the renovation of this eye-catching venue for the World Cup included the construction of a hulking roof to protect spectators from the elements - it will certainly come in handy today."

Image source, AFP

Germany make two changes from the side which beat the USA as Mario Gotze returns and former Everton defender Shkodran Mustafi replaces Mats Hummels, who has the flu.

Germany: Neuer; Mustafi, Mertesacker, Boateng, Howedes; Lahm (C), Schweinsteiger; Ozil, Kroos, Gotze; Muller