#2 Exploit Nigeria's set-piece weakness
As correctly pointed out by Iceland's central defender, Kari Arnason, the Nigerians do have a problem while defending set-pieces.
Prior to the game against Iceland, the Super Eagles had conceded 4 goals in 3 games against England, Czech Republic, and Croatia.
To make matter even worse, the one conceded against Croatia was an own goal. Even in the initial stages of the game against Iceland, the African side looked bereft of ideas during set-pieces.
Although it does not seem to be a major issue, it must be duly noted by Jorge Sampaoli. As per the current qualification scenario, the Nigerians require only a point in their last game against the Albiceleste to qualify for the knock-out rounds of the World Cup.
So the Africans will be content to defend deep and thus, it will be hard for Argentina to score via open play. So, they will need to utilize the set-piece vulnerability of Nigerians in order to have any chance of qualifying for the knock-out stages of the World Cup.