Coach Gary Gold said his team will need to tighten up their defence considerably if the United States are to have any chance of leaving the World Cup with a rare win after they were walloped 47-17 by Argentina on Wednesday.
Despite a decent start, when they should have led, the Americans were too often disorganised as the Pumas ran in seven tries - more than half of them dotted down by players not troubled by the inconvenience of a tackle - in the Pool C encounter.