Britain's Andy Murray pulled off the biggest win of his young career as he stunned top seed Andy Roddick in the SAP Open semi-finals in San Jose.
The 18-year-old Scot reached his second ATP tour final with a 7-5 7-5 victory over the former US Open champion.
Roddick, 23, was looking for a hat-trick of victories in the event.
But Murray broke him in the 11th game of both sets to book a final date with Lleyton Hewitt, who beat American Vincent Spadea 6-3 6-4 in his semi.
"I was almost a little sick because of nerves but in the end I came though," Murray, the world number 60, said after his first win over a player ranked in the top 10.
"Beating Roddick in his home country is like a dream come true."
"I couldn't get the ball to go through the court how I would have liked"
Roddick had looked the more comfortable on his serve in the opening set until Murray showed impeccable timing to break him at 5-5 and serve out the set.
The Dunblane teenager looked on course for victory when breaking the American again in game five of the second set, only for Roddick to break back immediately.
But Murray struck again at 5-5 and then held his nerve in a thrilling final game to wrap up a famous win.
"It just seemed like I couldn't get the ball to go through the court how I would have liked," said Roddick.
"It was difficult. I wasn't getting much bite on my service action. It was frustrating."
Sunday will bring Murray his second tour final after losing to Roger Federer in the final of the Thailand Open last October, while it will be Hewitt's first final for nearly a year.
"I felt like I played pretty solid," said Hewitt, who dominated Spadea with his aggressive groundstrokes from the baseline, hitting 25 winners in all.
"I put pressure on nearly all of his service games. I was trying to dictate as much as possible and get him on the defensive."
The former world number one has not won a title since a tournament in Sydney 13 months ago.