Albert Rusnák scored on a penalty kick, Jordan Morris added an insurance goal and Stefan Frei posted his 12th career clean sheet in the postseason as the Seattle Sounders beat FC Dallas 2-0 in a series opener.
Amine Bassi, Nelson Quiñónes and Corey Baird scored goals in the first 14 minutes and the Houston Dynamo cruised to a 5-0 victory over the Portland Timbers.
Cristian Espinoza scored on a first-half penalty kick and assisted on a second-half goal by Miguel Trauco to lead the San Jose Earthquakes to a 2-0 victory over the Seattle Sounders.
Gareth Bale converted the resulting penalty kick in the 82nd minute, giving Wales a 1-1 draw that left the Americans feeling frustrated and made their path to the knockout stage more precarious
Jessie Fleming scored on a penalty kick in the 74th minute and Canada earned a 1-0 semifinal victory over the United States in the Olympic women’s soccer competition.
Raúl Ruidíaz scored on a penalty kick in the 88th minute and the Seattle Sounders ran their franchise-record, season-opening unbeaten streak to 10 with a 2-1 victory over Real Salt Lake.
Brenden Aaronson, Daryl Dike and Reggie Cannon goals powered the United States past Costa Rica 4-0 in an exhibition to complete a grueling stretch of four games in 11 days.