The U.A.E. team was the last of the four teams to be invited to the U.N. Cup and the first of the U-20s, whose only tournament appearance has been in the 2017 World Cup.
The team, coached by current United States goalkeeper Bill Hamid, played against the New York Cosmos in the tournament opener.
The U.B.C. team will play in the championship game in New Jersey on Saturday night, while the Uyghurs will be playing in the U20 World Cup final on June 25.
The U-19s will face China in the semifinal.
The semifinals will be played on June 30.