Sixteen-year-old Lily Yohannes scored in her national team debut and the United States defeated South Korea 3-0 in an exhibition on Tuesday night.
Crystal Dunn and Sophia Smith also scored for the U.S., playing its second game under coach Emma Hayes.
Hayes was named coach last November, but remained in Europe to finish the season with Chelsea. She replaced Vlatko Andonovski, who stepped down after the U.S. was knocked out of the Women's World Cup last summer in the round of 16.
The U.