#2 Argentina vs Croatia (21 June)
Argentina and Croatia are in a tough group themselves, what with Iceland and Nigeria joining them in Group D. The Nigerian side topped their qualifying group which had African champions Cameroon and a highly-fancied Alegria while Iceland have shown what they are capable of at Euro 2016 and topping their group which had Croatia.
But this Croatian side are a talented bunch. The likes of Luka Modric, Ivan Perisic, Mario Mandzukic and Ivan Rakitic will be leading the charge for the Vatreni. Croatia had beaten Spain to top their group in Euro 2016 before they were knocked out by Portugal.
Argentina may have reached the 2014 final but that may be a step too far this time. The squad is very top heavy with world-class players leading the line - Lionel Messi, Paulo Dybala, Gonzalo Higuain, and Angel Di Maria to name a few.
However, Argentina are weak at the back and were dealt a cruel blow when Sergio Romero was ruled out of the World Cup with a knee injury.
Nevertheless, this is a contest where anything could happen and that is why it is more than just a clash of heavyweights. The result could potentially decide who tops the group as the runners-up may end up facing Spain in the Round of 16.