Eddie O'Sullivan refused to write off Ireland's chances of reaching the World Cup quarter-finals despite their shattering 25-3 defeat by France.

Ireland needed victory at the Stade de France to put one foot in the knockout stages but they will now head to Parc des Princes a week on Sunday needing to secure a bonus-point victory against Argentina.

"Playing Argentina is going to be another challenge," he said. "We were hoping France would not play as well if we did not get a lead but they played well. We will dwell on this for 24 hours but we have to move on."