Andy Murray held his nerve to defeat childhood hero Tim Henman in Basel and secure the biggest win of his short career.
Murray served for the match at 5-4 in the second set at the Davidoff Swiss Indoors but lost the next three games as Henman battled back to force a decider.
The British number one looked to have the upper hand as the match progressed but the 18-year-old from Dunblane won the decisive tie-break 7-4 to seal a memorable 6-2 5-7 7-6 victory.
Murray broke serve in the opening game of the match after being gifted two break points by a wild forehand from Henman.
And the teenager repeated the trick in the third game as Henman again demonstrated his weakness on the forehand wing with a costly miss.
Murray, now ranked 70th in the world, had to save one break point in the fifth game before serving out for the set after 34 minutes.
Henman looked destined for early exit when Murray recovered from a 3-1 deficit to serve for the match at 5-4 in the second set.
The British number one refused to give in, however, and broke back to level at 5-5 before taking the next two games as well to take the set 7-5 and force a decider.
Murray's frustration was obvious to see at the beginning of the decider, an audible obscenity indicating his anger at wasting his chance to seal victory in straight sets.
But he maintained his composure enough to hold serve throughout the set and take the match into a decisive tie-break, and quickly raced into a 3-0 lead.
A winner which clipped the baseline saved the first of those but Murray held his nerve to put away a forehand volley on the next to seal an historic first triumph.