Britain's Dan Evans produced a double fault on championship point - after failing to convert three of his own - to miss out on his first ATP title.
Evans, 28, lost 3-6 6-3 7-6 (9-7) in a dramatic Delray Beach Open final against Moldova's Radu Albot.
Despite the agonising defeat, Evans is now back on the verge of the world's top 100 after a great week in Florida.
Evans was unranked when he came back last April from a one-year ban for testing positive for cocaine.
He won six matches after coming through qualifying, beating world number nine John Isner in the last four.