Joanna Lohman's goal in the 39th minute was the deciding factor in Washington's 1-0 victory over the Dash.
The Houston Dash were unable to break Washington's four-game unbeaten streak Saturday night, falling in a 1-0 loss at Maureen Hendricks Field at Maryland SoccerPlex.
Joanna Lohman netted the lone goal of the match in the 39th minute. Spirit forward Christine Nairn picked out a wide open Lohman with a pin-point cross from the right flank and Lohman converted inside the box with a header.
Houston entered the match looking to carry momentum from their impressive road victory over FC Kansas City last week, but were in tough against the undefeated Spirit.