World Cup debutants Iceland are rated the 18th best football-playing nation across the globe with 1026 points, while Croatia retained their 15th spot after gathering 1053 points.
2014 Fifa World Cup runners-up, Argentina, despite their stationary status are the second best team in South America and no. four in the world.
As it stands, Gernot Rohr’s Eagles are the least ranked team in Group D ahead of the global football showpiece which kicks off in June.
Nigeria begin their sixth World Cup campaign against Croatia on June 16 at Report Kaliningrad Stadium, with Argentina trying Iceland for size earlier at Otkritie Arena, Moscow.