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Messi scores winner in injury time
Argentina through to last 16
Game played in Belo Horizonte
What a moment for the Argentina number 10. A truly brilliant goal an what a way to win the game.Argentina are into the last 16 - who will join them?
Next up is the game between Germany and Ghana - follow that one here.
South American football expert Tim Vickery
BBC Radio 5 live
"It was a remarkable finish. In general, Argentina's big name individuals haven't really turned up yet. It was a game where they needed penalty box presence and Gonzalo Higuain was poor.
"Sergio Aguero was frustrating, Angel Di Maria the same, but then, the one moment. Everyone who was in that stadium will carry away from there a memory of an extraordinary goal."
Former Celtic manager Neil Lennon
BBC Radio 5 live
"I'm exhausted. On the edge of my seat. What a performance from Iran against a world class team. It's taken the best player on the planet to separate the teams. Magnificent and enthralling to watch.
"It's just that little half a yard and he gets the whip, the bend and the power. A spectacular piece of individual brilliance."
Lionel Messi has scored eight goals in his last seven appearances for Argentina. By his Barcelona standard that's a bit slack.
David Ornstein
BBC Sport at Estadio Mineirao
"Estadio Mineirao exploded to the noise of Argentina fans celebrating a goal that knocked the stuffing out of every one of Iran's players, staff and fans. The scenes of unbridled blue and white joy could not have contrasted more sharply with the absolute desolation of the men in red.
"A number of Iran players dropped to their knees in disbelief, their substitutes looked in total shock, their followers fell silent for the first time all day. What a moment and how cruel football can be."
Wale Ibraheem:, external The little magician has done it again!
Stuart Morrison:, external Heartbreaking for Iran!
Alan McWhan:, external About time, Messi. Feel sorry for Iran, who have played incredibly well.
Send us your views on Lionel Messi and Argentina winning at the death. Tweet #bbcworldcup, text 81111 or comment on the BBC Sport Facebook page., external
Argentina are through into the last 16. That does not come close to telling the story.
Rob, Newbury, via text: A travesty. The awful Messi gets lucky. He has been lazy and sulky all afternoon. Greatest ever? Not even close.
Former Celtic manager Neil Lennon
BBC Radio 5 live
"Lionel Messi transcends the sport for me. You can put 50 people behind the ball and he is the exception to the rule. He is a footballing God."
It was said before the tournament that to be one of the greats Lionel Messi would need to drag his country through in a World Cup.
Two games in and he is doing exactly that. He still hasn't played very well but you can't fault him for impact!
Former Celtic manager Neil Lennon
BBC Radio 5 live
"Cometh the hour, cometh the man. And he is the man. He is the difference in so many games and he's done it again.
"You know what he's going to do, take a step and curl it, but there's nothing the magnificent Iranians can do. It is just world class."
Is that the sign of greatness? To deliver when it matters?
Image source, Getty ImagesWow!
What a goal from Lionel Messi! Again, he's hardly been in the game. Again, he wins the game with a wonderful hit!
He gets the ball just outside of the box, there are six or seven red shirts around him but he bends a beauty into the top corner. Goalkeeper had no chance.
A cruel blow for Iran. But a beautifully delivered one...
Image source, Getty ImagesFOUR MINUTES added on...
Terrible from Rodrigo Palacio, who lets the ball run away from him on the wing and out of play. Argentina have melted in the mid-afternoon sun.
Former Celtic manager Neil Lennon
BBC Radio 5 live
"Extraordinary. Ghoochannejad ran through, he had the legs, got the shot off, hit the target and it's a brilliant save.
"He was under a lot of pressure to get the shot off but he did and hit the target. He did all he could really."
Two minutes to go. A quite incredible 0-0 this has been...
Argentina have a sniff from a corner but Iran then break and Reza Ghoochannejhad is in on goal! He takes the shot early and it's well saved by Sergio Romero.
Amazing stuff...
Decent opening for sub Rodrigo Palacio but goalkeeper Alireza Haghighi makes the save at his near post. It's looking like a stalemate...
Former Celtic manager Neil Lennon
BBC Radio 5 live
"Are Argentina going to gamble? At the moment they are crossing the ball into the box but there's no-one there to head it in?"