Andy Farrell challenged Ireland to be more ruthless after they swept aside Argentina with a 42-12 bonus-point victory in the Nations Championship in Dublin.

Hugo Keenan scored a hat-trick as the hosts ran in six tries but head coach Farrell felt his side missed opportunities to inflict even greater damage on the Pumas.

Further tries from captain Dan Sheehan, fly-half Sam Prendergast and replacement hooker Ronan Kelleher completed a dominant display against opposition hampered by ill-discipline and a string of costly errors.

Andy Farrell challenged Ireland to be more ruthless after they swept aside Argentina with a 42-12 bonus-point victory in the Nations Championship in Dublin.

Ireland’s emphatic win was a third from four matches in the competition after summer successes against Australia and Japan were followed by defeat against New Zealand.

“Obviously, the scoreline is a good one because not many teams do that to Argentina,” said Farrell.…