I do not think there is any doubt about the winner in this game, since it is easy or difficult for Argentine to pay the resistance of Iran and to take the second tripe and together the qualification in the next round.
In the game with Bosnia the Argentines did not even play a good game. They were anxious but showed and do not want to load at the moment or show their momentum so early.
Iran against Nigeria took the X and had the best chance to open the score. Queiroz's players made an amazing regular game, they did not miss out on the shot but they could not make the 3 goals in good times.
In Iran this period is important for the sport of the country. It has created a very good climate for the country after the volleyball's successes (victories with Brazil and Italy) and there is a dynamism shaped so that everyone thinks they can reach the miracle and at least not lose from Argentina. This is, in fact, the most important game for the team at Worldtick 2014, all players want the result and become the popular heroes, telling their children how they got the result from Messi and put a black age in the past which has passed the country's football in recent years.
The shot is not expected to change. Defense, defense, defense, no space to the opponent and slow-pace and ball control. Argentina has no reason to dismantle Iran. Especially under the hot sun at midday in Brazil and with the Iranians kicking and playing with great passion, surely the Argentines will not want to sacrifice their presence in the event with some injury. An 2-0 will be enough, maybe 3-0. I do not expect Iran to score, as funny as Argentina's defense. I think under 3 is a bet that has good chances in this showdown.