This isn't a cracker, I'm afraid. Nigeria might have most of the possession but they are struggling to hurt their opponents. Oboabona is back on for the Super Eagles.

There was bound to be a disappointing game somewhere in this tournament. This is shaping up to be that match.

Nigeria's Godfrey Oboabona is carried off on a stretcher after coming off worse in a challenge with Charlton forward Reza Ghoochannejhad.

The Super Eagles are down to 10 men while Oboabona receives treatment on the side of the pitch.

Image source, Getty Images

Former England captain Rio Ferdinand
MOTD

"Nigeria have got quick lads up front. I've played against Victor Moses and he is very unpredictable. With that pace up front they'll be a threat."

For the first time Iran are beginning to settle but they are not helping themselves by gifting Nigeria possession with some careless passing.

Celtic's Efe Ambrose skips past an Iran defender before whipping in a cross that Alireza Haghighi manages to hold this time.

Former Republic of Ireland midfielder Kevin Kilbane
MOTD

"Argentina and Bosnia looked very good last night and you feel these two are probably the weakest in the group. Both Nigeria and Iran will have to win this if to stand a realistic chance of going through."

Chris Waddle
BBC Radio 5 live

"Iran like a tackle and they're competing well. I just wish they'd slow down and get their foot on the ball when they get it.

"Victor Moses has always got a trick and a lot of talent, jhe ust can't put it together as a package week in week out. He's still young but as a flare player you need a bit of consistency, which he's not had over the last two or three seasons."

Plenty of possession by Nigeria in these early exchanges.

Victor Moses's pace is causing Iran all kinds of bother and Carlos Queiroz's first problem is to stop the raids from the right that are putting his team under big pressure.

Image source, Getty Images

RS:, external Some are forgetting that Nigeria the African champions. Keep calm and relax. The Super Eagles have got this.

Seth: , externalAs a Nigerian if we don't beat Iran, we should save Fifa their money by coming home.

Share your views on Twitter via #bbcworldcup, external, text 81111 (UK users only) or post on BBC Sport Facebook., external

Former Republic of Ireland midfielder Kevin Kilbane
MOTD

"Goalkeeper Alireza Haghighi didn't look comfortable, he came through bodies and there is not much in that. It looks a fair challenge and he got very lucky. That is poor goalkeeping."

There's plenty of Iran supporters inside the ground and they're adding to the party atmosphere.

They're a right noisy lot even though they haven't had much to cheer in this game so far. Iran keeper Alireza Haghighi spills a corner before Ogenyi Onazi drills an effort narrowly wide. All the action in the Iran area so far.

Chris Waddle
BBC Radio 5 live

"Iran are getting behind the ball and Nigeria are playing their way in. Iran look nervous and energetic and trying to compete all over the park. Nigeria are just feeling their way into the game."

Iran are defending deep in the early stages. Victor Moses is clearly determined to join the party and tests Alireza Haghighi will a low shot from the edge of the area. It's a confident start from the men in green.

And Iran get us under way in southern Brazil.

There's a huge din inside the stadium as the teams line up for the national anthems. Iran's players look as though they mean business. Nigeria's national anthem calls for loyalty and togetherness. Let's see if they take note.

Former England captain Rio Ferdinand
MOTD

"John Mikel Obi's experienced and has played a lot of football at the top level in Europe so he's got the responsibility to try to drag Nigeria through if he can."

Former England defender Phil Neville
MOTD

"Iran will look to counter through the front two. They have the speed and they will be the best organised team in the tournament, that is what Carlo Queiroz does."

There's a carnival atmosphere at Arena da Baixada as the teams emerge from the tunnel. There's a sea of colour in the stands and on the pitch. Iran are in white shirts with a tinge of green and red. Nigeria are in their all green strip.

Image source, AFP

You can watch the 20:00 BST kick off between Iran and Nigeria live on BBC One.

That match will be (almost) immediately followed by the 23:00 kick-off between Ghana and USA, with BBC One coverage to start at 22:40.

Alternatively, if you're on the move or can't get near a TV, you can watch live streams of both matches at the top of this page, or listen on BBC radio.

BBC Radio 5 live's coverage of tonight's World Cup action has already started.

And don't forget, if you do choose to watch online, you can choose from multiple camera angles - including tactical cam and player cam.

Andrew on text: Is this the World Cup that an African nation can finally make it through to the semi-finals or even the final? Ghana went close four years ago in South Africa. The African teams and their fans always bring life and soul to every tournament.

What of Nigeria? Dubbed the 'Super Chickens' after failing to qualify for the 2012 African Cup of Nations, Stephen Keshi's side arrive in Brazil as the 2013 African champions.

They scored 11 goals in qualifying but only conceded four times - a defensive record bettered only by world champions Spain.

Sunday Mba, who hit the winner in the 2013 Africa Cup of Nations final, has been left out of the squad but there is a sprinkling of Premier League names that have made it to Brazil, while Celtic defender Efe Ambrose has also made it and starts against Iran.