Leinster held on for a 13-8 victory at Thomond Park.
Leinster secured a big away win to their rivals Munster over the weekend.
Leo Cullen’s side were 13-8 winners at Thomond Park, with Athlone’s Robbie Henshaw featuring for the winning side.
Josh Van Der Flier got the only try of the game for Leinster, with Dan Kelly crashing over late on, but Leinster held on to claim the points.
They return to action in the URC this weekend at home to Connacht.
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