British number one Jack Draper reached the final of the Qatar Open with a 3-6 7-6 (7-2) 6-3 victory against Jiri Lehecka.
The Czech Republic's Lehecka took control of the opening set after breaking serve in the eighth game, before a more even second set went to a tie-break.
Draper - who defeated former Wimbledon runner-up Matteo Berrettini on Thursday - produced a near-flawless performance in the tie-break to send the match to a decider.
The final set went with serve until a double fault from Lehecka gifted the 23-year-old Briton a break, with the Czech throwing his racket to the floor in frustration.