Cristian Roldan scored the game-winner by using a slight touch to flick the ball up and over Pumas goalkeeper Matt Grosey in the 71st minute. Grosey made some key saves throughout the 90 minutes, including a stop on Roldan in the 59th minute, but he was unable to stop the Sounders from advancing to the Fifth Round of the Open Cup with a 2-0 win. Joevin Jones netted a goal in the 91st minute after Pumas attempted to push forward for the equalizer.

While Mike Ramos was active in his touches moving forward, the Sounders had the best opportunities to score in the first half. From a corner kick in the sixth minute, Zach Scott redirected the cross towards goal with good header, but the ball caromed off the crossbar. Moments later, Darwin Jones put a shot just wide of the far post. In total, the Sounders outshot the Pumas, 6-1, during the first 45 minutes.