Rosenallis left Portlaoise on Friday empty handed after a heavy defeat.
The Harps produced one of the most impressive performances in any of the midlands club championships over the weekend.
Alan Guilfoyle's side ran up a scoreline of 3-19 to 0-13 against Rosenallis at the LOETB Centre of Excellence on Friday evening.
Portlaoise meanwhile made a winning return to the senior grade.
They were 1-14 to 0-14 winners over Castletown at the same venue on Saturday.
Prior to that the county champions from last year were well beaten by Rathdowney Errill and Clough Ballacolla made a winning start to their campaign against last year's beaten finalists, Abbeyleix.
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