After Croatia's 3-0 defeat of Argentina in the second round of games of Group D, the South American team's future in the tournament is in question.

With the result of the Iceland and Nigeria game on Friday, the chances of Argentina moving onto the last-16 stage becomes dependent on the final game, between Iceland and Croatia.
Here, we run down the permutations of how the closing matches may come to pass.
If Iceland beat Nigeria (Croatia 6 points, Iceland 4, Argentina 1, Nigeria 0)
This would be the worst possible outcome for Lionel Messi & Co. because, to continue in the tournament, Argentina would have to grab three points from their final game against Nigeria and hope Iceland don't win against Croatia.
Here the goal difference will be very important as well, as a draw between Iceland and Croatia could also see the Argentines leaving Russia and the Croats claiming first place in group with Iceland following in second.
If Iceland and Nigeria draw (Croatia 6, Iceland 2, Argentina and Nigeria 1)
Of the three possibilities, this would do the least amount of damage to the Albiceleste. They would still require a win against Nigeria but this scenario allows the possibility of using Croatia's win over Iceland to sneak the team into the round of 16.
Croatia would top the group and Argentina would fall into second place unless Croatia and Iceland draw, which then leads to goal difference becoming the decision maker.
If Nigeria beat Iceland (Croatia 6, Nigeria 3, Argentina and Iceland 1)
The last possible way Argentina can progress in the tournaments requires a win against Nigeria in their last group game and would also be dependent on Iceland losing against Croatia.
Here, the South American team would be able to move on by acquiring three points, bringing their total to four against Nigeria's three and Iceland's one.
Source:https://www.wownaija.com/2018/06/argentinas-hope-depends-on-nigeria-as.html?m=1