Seattle Sounders booked a place in the MLS Cup final for the first time in their history after completing a 3-1 play-off victory over the Colorado Rapids.
After winning the first leg of the Western Conference final on home soil earlier in the week, they finished the job in Colorado, winning 1-0 thanks to Jordan Morris' second-half goal.
The 22-year-old ensured the Sounders' progress when he coolly dinked home from eight yards after being put through by Nelson Valdez's clever 56th-minute pass.
It was his 13th goal of the campaign and arguably his most important.
Brian Schmetzer's side will appear in the showpiece final for the first time at the eighth attempt and will await the winner of the Eastern Conference final, where Montreal Impact lead Toronto FC 3-2 after the first leg.