The Union used the same lineup that ran through DC United a week ago, with Andrew Wooten and Kacper Przybylko paired up top. The Dynamo handed Christain Ramirez his first start since arriving from LAFC and kept Alberth Elis on the bench in his return from a one-game suspension.
Early in the match, Houston sought to overload Ray Gaddis on the left but Alejandro Bedoya’s covering runs kept the visitors at bay.
In the fifth minute, a Jack Elliott turnover sent the Dynamo off on a counterattack that Philly cleared after a scramble near the box.
Houston responded down the left and Memo Rodriguez put in a cross that was too high for Mauro Manotas when it looked as though the striker had Collin beat at the back post.