Ireland had to score four tries and beat Argentina by more than seven points in their big game at the Parc des Princes, but once the Pumas got through a shaky start, such a result never looked possible.
With fly-half Juan Martin Hernandez (left) running the game in every respect and the Argentina pack in control for most of the time, Ireland rarely looked good enough to earn the win they needed.
They matched the Pumas try-for-try, but basically, like Wales the day before, they weren't good enough against a side they would have beaten without a problem a few years ago.
That isn't to take anything away from the Pumas, who have proved worthy of their fourth ranking in world rugby. They will be favouites to beat the Scots at Stade de France.
With two tries each, it wasn't simply that Argentina kicked better than Ireland - they were better in every respect.
Hernandez kicked four drop goals as the Pumas matched the performance that beat France on the tournament's opening day.
Ireland coach Eddie O'Sullivan's future could be in doubt after a disappointing World Cup for an Ireland side tipped to do better than any of the other home countries, though he insisted after the game that he intends to see out his contract.
Ireland skipper Brian O'Driscoll said: "It was difficult, we were playing against a team that refuses to play in their own half.
"They controlled it well in fairness. They are difficult to play against, particularly when you have to chase the four tries."
How unfair that Argentinia should play the game as they wanted instead of as Ireland wanted! The form and results produced by Argentina has shaken France and Ireland and it should serve as a wake-up call to world rugby by a country that doesn't have a professional competition and whose players mostly play for clubs in Europe.
What lies in the future for Argentina remains to be seen, but they surely deserve a chance to play regular internationals against the sort of opposition they have beaten in France.
Ireland (10) 15
Tries: O'Driscoll, Murphy
Con: O'Gara
Pens: O'Gara
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