Great Britain's wait for a first Billie Jean King Cup title goes on after they suffered a 2-0 loss to the United States in the semi-finals.
Katie Boulter needed to beat world number seven Jessica Pegula to keep Britain in the tie after a battling Sonay Kartal lost to Emma Navarro in the first singles match.
But after Boulter took the first set, Pegula fought back to win 3-6 6-4 6-2 and secure a 31st appearance in the final for Lindsay Davenport's team.
Both Boulter and Kartal - who lost 3-6 6-4 6-3 to Navarro, a player ranked more than 60 places above her - will be left to rue missed chances from two tight matches.