A Messi Victory
A spunky, gritty Iran gave Argentina a much tougher time than almost anyone could have expected. Not until the 92nd minute (in stoppage time) was Messi able to conjure up enough magic for the win (1-0). Iran had its own chances to score, especially on a probable penalty that the ref didn't manage to see.
Pretty clearly, Iran needs to be taken very seriously. Argentina, on the other hand, may have shown some weaknesses.