There was heartbreak for Waterford FC after a battling performance in Oriel Park last night.
Blues' keeper Laurence Vigoreaux kept his side in contention after a spell of heavy pressure late in the first half, saving a number of the home side's efforts on goal.
Waterford's best chance came in the 72nd minute after a John Martin strike was saved by the Dundalk keeper.
It looked like The Blues' were going to hold out for the draw, but a Gary Comerford effort to clear the line ended up in the back of his own net in the 93rd minute of play.
FT Dundalk 1 Waterford FC 0