Alexa Mackintire, Erin Scherrer and Ainsley Gill each scored a goal as No. 2 Duke downed Old Dominion 3-0 in a field hockey match at Jack Katz Stadium.
The Monarchs (4-5) dropped to 1-4 against ranked opponents this season.
Mackintire's cross deflected off an ODU defender and into the goal for what proved to be the game-winner.
ODU's best scoring opportunity came late in the first half, when Erin Huffman's penalty-corner shot missed just wide. Cameran Nery-Strickland had the Monarchs' only shot on goal. ODU goalkeeper Kealsie Robles made seven saves.
The Monarchs' road trip continues with matches at Liberty on Friday and No.