Newly crowned Women's National League champions Athlone Town suffered a 1-nil loss at Peamount.
Eleanor Ryan-Doyle grabbed a late winner for the Dubliners.
Athlone's Cup final opponents Bohemians drew 1-all at Treaty United.
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Shamrock Rovers beat Cork City 2-1, with Shelbourne winners by the same scoreline at home to Wexford.
Galway United won 3-nil against Waterford and DLR Waves edged out Sligo Rovers 3-2.
