Switzerland came out on top when these teams met at the 2018 World Cup but Serbia need to win this time to make the last 16, and I think they will.
Statman Dave had Serbia as his dark horses at this tournament and he knows his football inside out.
There's no way he will get this one wrong - but, if he does, I will lose some faith in him.
Prediction: 2-1
Quiet gathering of fans
Serbia v Switzerland (19:00 GMT)
Emma Sanders
BBC Sport at 974 Stadium
BBC SportCopyright: BBC Sport
Matches involving European teams have generally been far quieter around the stadium before kick-off.
The majority of supporters in Qatar are here to watch the African and South American nations, with Mexico also having a strong following.
I did get here early - over three hours before kick-off - and there were a few Serbia fans mingling around taking photos in front of the 974 Stadium sign.
A spotted a young family from Switzerland too, who had properly dressed up for the occasion, and there were plenty of Liverpool shirts with Xherdan Shaqiri's name on the back.
Alves to become oldest captain
Cameroon v Brazil (19:00 GMT)
Getty ImagesCopyright: Getty Images
Dani Alves will become Brazil's oldest World Cup captain tonight.
The 39-year-old full-back, who now plays in Mexico for UNAM Pumas, said: "For me, it represents the fact that I can wear the Brazil jersey. It makes me very proud to be here."
The former Barcelona defender has recovered from a knee injury to compete at his third World Cup.
"I've been with the Brazilian squad for many years and to be able to wrap up this cycle, playing a World Cup, makes me very happy," added Alves, who made his international debut in 2006.
"It's been 16 years with the national squad and I've tried to do my very best. Life, I think, always rewards the people who love what they do, who truly do their best in the mission.
"I think I'm reaping what I have planted over those 16 years."
'Cameroon need to win'
Cameroon v Brazil (19:00 GMT)
.Copyright: .
We've seen Serbia and Switzerland focus on keeping Brazil out and they both managed it for a while.
The difference is Cameroon need to win this game to have a chance of staying in the tournament.
If Cameroon open up and play expansive football against them, things are only going to go one way.
Prediction: 0-4
'It has to be something crazy and unexpected'
Cameroon v Brazil (19:00 GMT)
BBC Radio 5 Live
Getty ImagesCopyright: Getty Images
Former Cameroon defender Sebastien Bassong on BBC Radio 5 Live: “Cameroon haven’t been at the level I expected them to be. But I’m not really surprised that it’s going to go until the last minute, with Cameroon we like to be with our back against the wall in order to make a miracle. Why are we doing that? I don’t know but it’s in our DNA. We’ll see what happens tonight.
“If you look at the record, even just to qualify for the World Cup or at the African Cup of Nations, it’s never been straightforward.
"It’s never been something easy, something chill, at some point we always have to wake up. It has to be something crazy and unexpected. That’s what we’re made of and hopefully tonight it will be the same again.”
Another shock on cards?
Cameroon v Brazil (19:00 GMT)
Andy Cryer
BBC Sport in Qatar
BBC SportCopyright: BBC Sport
The Cameroon fans are doing their best.
Brazil fever may have hit Lusail Stadium but this is a huge game for Cameroon.
Win - couple with a Switzerland loss - and they could well be heading through.
'We'll be waiting'
Serbia v Switzerland (19:00 GMT)
Getty ImagesCopyright: Getty Images
If Switzerland finish second in Group G, they will face Group H winners Portugal in the first knockout round on 6 December.
Asked during Thursday's press conference about the prospect of facing Manchester City team-mates Joao Cancelo, Ruben Dias and Bernardo Silva, Switzerland defender Manuel Akanji replied: "I'm confident enough to tell my Man City colleagues that we'll be waiting for them in the last 16."
'No provocation'
Serbia v Switzerland (19:00 GMT)
When the sides met in the 2018 World Cup, Granit Xhaka and Xherdan Shaqiri scored and appeared to make an eagle gesture with their hands as they celebrated, a symbol of the two-headed eagle on the Albanian flag.
After the break-up of the former Yugoslavia in the 1990s, Serbia responded to separatist pressure from Kosovo by launching a brutal crackdown on the territory's Albanian population, which ended with Nato military intervention in 1999 - while the country became independent from Serbia in 2008.
Xhaka's father spent three and a half years as a political prisoner in Yugoslavia, while Shaqiri was born in Yugoslavia before emigrating to Switzerland as a child.
Earlier in this year's tournament, Serbia hung a flag in their dressing room that showed the outline of Kosovo filled in with the Serbian flag and the words 'no surrender'.
Getty ImagesCopyright: Getty Images
Serbian journalist Nedeljko Iljukic, speaking on BBC World Service's World Football in Qatar said: "A few days ago everyone wanted to know about the flag in the Serbia locker room, the tensions between the two teams and the fans but I can honestly say, it will be an ordinary football game.
"There is no provocation. People in the UK or wherever - I'm from Serbia - don't know exactly what has happened in our region. I don't know what the problem is with the flag in the Serbian locker room. The main problem, the only problem, is the social networks."
Swiss journalist Andreas Boni, also speaking on World Football in Qatar said: "Xhaka's father was three and a half years in prison – and this is deep in Xhaka. The whole family story is deep in him, and when he scored the goal, all the emotions came out.
"I don't think [he will do it again] because he will learn from history I hope. He is very quiet at the moment - well balanced - but on the pitch it will be a fight. But that's what football should be - on the pitch a fight, but not [about] politics."
'We'd like to talk about their cheese'
Serbia v Switzerland (19:00 GMT)
Getty ImagesCopyright: Getty Images
Serbia say they will look for holes in the Switzerland defence as journalists reached for metaphors about the Swiss before their World Cup meeting.
Serbia coach Dragan Stojkovic was asked if they were facing a side ticking over with the precision of Swiss watches.
"We'd really like to talk about their cheese and find their weak spots - the holes - to get the result," he said.
"We knew after the [group stage] draw was held that Brazil is an entirely different dimension and we would be fighting for second place with Cameroon and Switzerland. These forecasts brought us to this point."
'Neymar won't be 100% before semi-finals'
Cameroon v Brazil (19:00 GMT)
BBC World Service
Getty ImagesCopyright: Getty Images
Brazilian football journalist Ricardo Setyon, speaking on BBC World Service's World Football in Qatar: "Neymar is the centre of everything around Brazil but I was sure that we are not Neymar dependant and that we could play without him. Then it happens and it is not like this, we need him there.
"He has an ankle injury and also a problem in the bone of the ankle, it’s not only the ligaments but a blood clot inside the bone. Normally it takes 20-25 days [to recover].
"Yesterday I was at the Brazilian camp… and I saw Neymar practising at the pool of the hotel and he was quite well, he was doing everything the other players were doing. He is going to be evaluated on Saturday, so he won’t play against Cameroon.
"In my opinion, he won’t be 100% before the semi-finals. He would maybe be 75% and it will depend on who we play in the round of 16 whether he will be on the bench or not. But basically, today Brazil is aware of something: we need Neymar.
"Hopefully Vinicius Junior starts playing football instead of whatever he’s playing because we need him sharp."
Neymar the main man
Cameroon v Brazil (19:00 GMT)
Andy Cryer
BBC Sport in Qatar
BBCCopyright: BBC
The other night is wall to wall Messi and Maradona shirts, this evening it’s Neymar. He isn’t even playing….
Huge cheers for Neymar as he appears on the big screens stepping off the Brazil team bus. The whole nation will be hoping he recovers from the ankle injury he sustained against Serbia to make his expected impact in the knockout stage.
Who is favourite to join Brazil?
Simon Gleave, head of
sports analysis, Nielsen's Gracenote: "With Gracenote
number one team Brazil already through, this should be a more or less
straight fight between Switzerland and Serbia but Cameroon have a chance too if
they pull off the biggest shock in World Cup history by beating Brazil.
"Gracenote
estimates a 65% chance of Switzerland progressing, a 32% chance of Serbia going
through and a 4% chance for Cameroon. Brazil are 99% certain of finishing as
group winners and playing South Korea with Switzerland having a 1% chance of
topping the group."
No thanks to the 0-0
Serbia v Switzerland (19:00 GMT)
Emma Sanders
BBC Sport at 974 Stadium
BBC SportCopyright: BBC Sport
I was here earlier in the tournament for the first group match at 974 Stadium between Mexico and Poland.
The bad news is that game was a 0-0 draw.
Since then, the stadium has played host to another four matches, with tonight being its sixth of the tournament.
The good news is that since the goalless draw, there have been 11 goals scored here in total, including the entertaining 3-2 victory for Portugal over Ghana.
I asked a Serbia fan earlier what his score prediction was: "0-0".
Oh.
How the last 16 is shaping up
Here's how the last 16 is shaping up with one group left to be decided.
South Korea, who clinched their place in the knockout stages with a stunning win over Portugal, will face the winner of Group G. As it stands, that would be Brazil.
Live Reporting
Gary Rose and Matt Howarth
All times stated are UK
Brazil at home?
Cameroon v Brazil (19:00 GMT)
One Brazilian has just told me about 30,000 have travelled to the World Cup from the country - looks even more to be honest.
This could be a Brazil home game...
Get Involved
Tweet using #bbcfootball or Text 81111 (UK standard rates apply)
'I think Serbia will win'
Serbia v Switzerland (19:00 GMT)
Switzerland came out on top when these teams met at the 2018 World Cup but Serbia need to win this time to make the last 16, and I think they will.
Statman Dave had Serbia as his dark horses at this tournament and he knows his football inside out.
There's no way he will get this one wrong - but, if he does, I will lose some faith in him.
Prediction: 2-1
Quiet gathering of fans
Serbia v Switzerland (19:00 GMT)
Emma Sanders
BBC Sport at 974 Stadium
Matches involving European teams have generally been far quieter around the stadium before kick-off.
The majority of supporters in Qatar are here to watch the African and South American nations, with Mexico also having a strong following.
I did get here early - over three hours before kick-off - and there were a few Serbia fans mingling around taking photos in front of the 974 Stadium sign.
A spotted a young family from Switzerland too, who had properly dressed up for the occasion, and there were plenty of Liverpool shirts with Xherdan Shaqiri's name on the back.
Alves to become oldest captain
Cameroon v Brazil (19:00 GMT)
Dani Alves will become Brazil's oldest World Cup captain tonight.
The 39-year-old full-back, who now plays in Mexico for UNAM Pumas, said: "For me, it represents the fact that I can wear the Brazil jersey. It makes me very proud to be here."
The former Barcelona defender has recovered from a knee injury to compete at his third World Cup.
"I've been with the Brazilian squad for many years and to be able to wrap up this cycle, playing a World Cup, makes me very happy," added Alves, who made his international debut in 2006.
"It's been 16 years with the national squad and I've tried to do my very best. Life, I think, always rewards the people who love what they do, who truly do their best in the mission.
"I think I'm reaping what I have planted over those 16 years."
'Cameroon need to win'
Cameroon v Brazil (19:00 GMT)
We've seen Serbia and Switzerland focus on keeping Brazil out and they both managed it for a while.
The difference is Cameroon need to win this game to have a chance of staying in the tournament.
If Cameroon open up and play expansive football against them, things are only going to go one way.
Prediction: 0-4
'It has to be something crazy and unexpected'
Cameroon v Brazil (19:00 GMT)
BBC Radio 5 Live
Former Cameroon defender Sebastien Bassong on BBC Radio 5 Live: “Cameroon haven’t been at the level I expected them to be. But I’m not really surprised that it’s going to go until the last minute, with Cameroon we like to be with our back against the wall in order to make a miracle. Why are we doing that? I don’t know but it’s in our DNA. We’ll see what happens tonight.
“If you look at the record, even just to qualify for the World Cup or at the African Cup of Nations, it’s never been straightforward.
"It’s never been something easy, something chill, at some point we always have to wake up. It has to be something crazy and unexpected. That’s what we’re made of and hopefully tonight it will be the same again.”
Another shock on cards?
Cameroon v Brazil (19:00 GMT)
Andy Cryer
BBC Sport in Qatar
The Cameroon fans are doing their best.
Brazil fever may have hit Lusail Stadium but this is a huge game for Cameroon.
Win - couple with a Switzerland loss - and they could well be heading through.
'We'll be waiting'
Serbia v Switzerland (19:00 GMT)
If Switzerland finish second in Group G, they will face Group H winners Portugal in the first knockout round on 6 December.
Asked during Thursday's press conference about the prospect of facing Manchester City team-mates Joao Cancelo, Ruben Dias and Bernardo Silva, Switzerland defender Manuel Akanji replied: "I'm confident enough to tell my Man City colleagues that we'll be waiting for them in the last 16."
'No provocation'
Serbia v Switzerland (19:00 GMT)
When the sides met in the 2018 World Cup, Granit Xhaka and Xherdan Shaqiri scored and appeared to make an eagle gesture with their hands as they celebrated, a symbol of the two-headed eagle on the Albanian flag.
After the break-up of the former Yugoslavia in the 1990s, Serbia responded to separatist pressure from Kosovo by launching a brutal crackdown on the territory's Albanian population, which ended with Nato military intervention in 1999 - while the country became independent from Serbia in 2008.
Xhaka's father spent three and a half years as a political prisoner in Yugoslavia, while Shaqiri was born in Yugoslavia before emigrating to Switzerland as a child.
Earlier in this year's tournament, Serbia hung a flag in their dressing room that showed the outline of Kosovo filled in with the Serbian flag and the words 'no surrender'.
Serbian journalist Nedeljko Iljukic, speaking on BBC World Service's World Football in Qatar said: "A few days ago everyone wanted to know about the flag in the Serbia locker room, the tensions between the two teams and the fans but I can honestly say, it will be an ordinary football game.
"There is no provocation. People in the UK or wherever - I'm from Serbia - don't know exactly what has happened in our region. I don't know what the problem is with the flag in the Serbian locker room. The main problem, the only problem, is the social networks."
Swiss journalist Andreas Boni, also speaking on World Football in Qatar said: "Xhaka's father was three and a half years in prison – and this is deep in Xhaka. The whole family story is deep in him, and when he scored the goal, all the emotions came out.
"I don't think [he will do it again] because he will learn from history I hope. He is very quiet at the moment - well balanced - but on the pitch it will be a fight. But that's what football should be - on the pitch a fight, but not [about] politics."
'We'd like to talk about their cheese'
Serbia v Switzerland (19:00 GMT)
Serbia say they will look for holes in the Switzerland defence as journalists reached for metaphors about the Swiss before their World Cup meeting.
Serbia coach Dragan Stojkovic was asked if they were facing a side ticking over with the precision of Swiss watches.
"We'd really like to talk about their cheese and find their weak spots - the holes - to get the result," he said.
"We knew after the [group stage] draw was held that Brazil is an entirely different dimension and we would be fighting for second place with Cameroon and Switzerland. These forecasts brought us to this point."
'Neymar won't be 100% before semi-finals'
Cameroon v Brazil (19:00 GMT)
BBC World Service
Brazilian football journalist Ricardo Setyon, speaking on BBC World Service's World Football in Qatar: "Neymar is the centre of everything around Brazil but I was sure that we are not Neymar dependant and that we could play without him. Then it happens and it is not like this, we need him there.
"He has an ankle injury and also a problem in the bone of the ankle, it’s not only the ligaments but a blood clot inside the bone. Normally it takes 20-25 days [to recover].
"Yesterday I was at the Brazilian camp… and I saw Neymar practising at the pool of the hotel and he was quite well, he was doing everything the other players were doing. He is going to be evaluated on Saturday, so he won’t play against Cameroon.
"In my opinion, he won’t be 100% before the semi-finals. He would maybe be 75% and it will depend on who we play in the round of 16 whether he will be on the bench or not. But basically, today Brazil is aware of something: we need Neymar.
"Hopefully Vinicius Junior starts playing football instead of whatever he’s playing because we need him sharp."
Neymar the main man
Cameroon v Brazil (19:00 GMT)
Andy Cryer
BBC Sport in Qatar
The other night is wall to wall Messi and Maradona shirts, this evening it’s Neymar. He isn’t even playing….
Neymar centre of attention
Cameroon v Brazil (19:00 GMT)
Phil McNulty
BBC Sport chief football writer at Lusail Stadium
Huge cheers for Neymar as he appears on the big screens stepping off the Brazil team bus. The whole nation will be hoping he recovers from the ankle injury he sustained against Serbia to make his expected impact in the knockout stage.
Who is favourite to join Brazil?
Simon Gleave, head of sports analysis, Nielsen's Gracenote: "With Gracenote number one team Brazil already through, this should be a more or less straight fight between Switzerland and Serbia but Cameroon have a chance too if they pull off the biggest shock in World Cup history by beating Brazil.
"Gracenote estimates a 65% chance of Switzerland progressing, a 32% chance of Serbia going through and a 4% chance for Cameroon. Brazil are 99% certain of finishing as group winners and playing South Korea with Switzerland having a 1% chance of topping the group."
No thanks to the 0-0
Serbia v Switzerland (19:00 GMT)
Emma Sanders
BBC Sport at 974 Stadium
I was here earlier in the tournament for the first group match at 974 Stadium between Mexico and Poland.
The bad news is that game was a 0-0 draw.
Since then, the stadium has played host to another four matches, with tonight being its sixth of the tournament.
The good news is that since the goalless draw, there have been 11 goals scored here in total, including the entertaining 3-2 victory for Portugal over Ghana.
I asked a Serbia fan earlier what his score prediction was: "0-0".
Oh.
How the last 16 is shaping up
Here's how the last 16 is shaping up with one group left to be decided.
South Korea, who clinched their place in the knockout stages with a stunning win over Portugal, will face the winner of Group G. As it stands, that would be Brazil.
Post update
Cameroon v Brazil (19:00 GMT)
Yeellllloooowwwwwws
Cameroon v Brazil (19:00 GMT)
Andy Cryer
BBC Sport in Qatar
Brazil on a match day is really something quite special.
Yellow, blue and green absolutely everywhere.
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Mark: The way this World Cup is going, won’t be surprised if Cameroon beat Brazil and go through