Andy Murray's hopes of winning a second tournament in a row were ended after he lost to Andy Roddick in the Memphis International semi-finals.
Murray ran out of steam in the semi-finals in Memphis
Murray fell to a 6-3 7-6 (7-4) defeat, his first loss in nine matches.
The 19-year-old had chances to take the match to a deciding set, but lost his way in the second-set tie-break.
Roddick, who lost to Murray in the semi-finals in San Jose last week, will play defending champion Tommy Haas in Sunday's final.
Murray dropped serve in his opening game, and struggled to get back into the groove afterwards as Roddick took the opener confidently.
He came up with some big shots and deserved to win the match, but I definitely didn't play my best
The Scot was under pressure in the opening game of the second set as well, but recovered from break point down to hold.
He put Roddick's serve under pressure for the first time in the sixth game, but Roddick fought back well.
The next Roddick service game saw Murray force the break, giving himself the chance to level the match by holding serve.
But Murray went to pieces, slipping 40-0 behind and gifting the break back to his opponent.
606 DEBATE: Give your thoughts on Murray's performance
Murray went 3-0 up in the tie-break only for Roddick to win seven out of the next eight points and seal the match with two aces.
"The two things that are important to do against him, I didn't really do," Murray said.
"I didn't serve particularly well and didn't return well.
"Andy came up with some big shots and big serves and deserved to win the match, but I definitely didn't play my best."
Roddick insisted: "I think I was a little more consistent than in San Jose. I tried to stay back a bit and tried to stay solid."
Earlier, Haas eased past Mardy Fish 6-3 6-4 to reach the final.
A break in the second game was enough to give Haas the opening set before he took advanatge of a Fish double fault at the start of the second.
He said: "I've played Roddick quite a few times now. Usually it depends on how he serves against me and that plays a big role. He is as competitive as they come."
Jamie Murray - Andy's brother - booked his place in the men's doubles final with American partner Eric Butorac after a 5-7 7-6 12-10 win over Thomas Johansson and Julien Benneteau.
They now face Austrian pair Julian Knowle and Jurgen Melzer.