American top seed Andy Roddick won his third Washington Classic title with a 6-4 7-6 defeat of the unheralded John Isner on Sunday.
Roddick also won at Queen's Club in June
Roddick, who also won at Washington in 2001 and 2005, captured his 23rd career singles crown and second of the year at the US Open warm-up event.
"I'm excited to get a win under my belt," Roddick said. "Hopefully I will get one or two more."
Wildcard Isner, ranked 416th, said: "It was great to be a part of it."
Isner, 22, who won five matches in a row on third-set tie-breakers, only made the field when Fernando Gonzalez withdrew.
But the 6ft 9in American earned a wildcard entry into the Cincinnati Masters event in two weeks and will jump to about 190th in the new ranking list.
Isner would have been the third-lowest-ranked player in ATP history to win a title after Aussie Lleyton Hewitt, in 1998 at Adelaide at 550th and Senegal's Yahiya Doumbia, in 1988 at Lyon at 453rd.
Roddick, who turns 25 later this month, won his only other title this year at Queen's in June.
His only other final was in February at Memphis, where he lost to Tommy Haas.