The United States and Germany played to a scoreless draw in regulation, but Mallory Swanson helped to give the American squad a critical goal in the semifinal match.
About four minutes into the extra frame, Swanson threaded an excellent pass up to teammate Sophia Smith, who buried the shot to give the United States a 1-0 lead.
This marks the second consecutive game the U.S. has had to go to extra time after a scoreless regulation period. Trinity Rodman did the honors in the quarterfinals against Japan, scoring in extra time to help the United States stay alive in the tournament.
If the American squad goes on to win, they’ll take on either Brazil or France in the gold medal game on Saturday.
Top Olympic Stories
Feeling out of the loop? We'll catch you up on the Chicago news you need to know. Sign up for the weekly Chicago Catch-Up newsletter.