Table schema:
CREATE TABLE table_name_66 (opposition VARCHAR, score VARCHAR, round VARCHAR, competition VARCHAR)

Question: What is the Opposition in the First Round of the UEFA Cup with a Score of 3–1 (h), 2–0 (a)?
SQL: SELECT opposition FROM table_name_66 WHERE round = "first round" AND competition = "uefa cup" AND score = "3–1 (h), 2–0 (a)"