Subsequently, he represented the under-21s in two UEFA European Championships. In the 2011 edition in Denmark, Adrián scored a brace in a 2–0 group stage victory over the Czech Republic, adding another in the next match against Ukraine (3–0). In the semi-final against Belarus, he scored the late 1–1 which took the game into extra time, adding another in that period in an eventual 3–1 win; he was awarded the Golden Boot as the highest scorer in the tournament.