This was Draper's first tournament since he retired from the Australian Open with a hip issue, but he repeatedly showed his supreme physical ability to outlast Lehecka in several rallies to take control of the third set.
British number one Jack Draper produced another gutsy display to down Jiri Lehecka in three sets at the Qatar Open and reach the fifth ATP Tour final of his career.
A first break was swiftly followed by a second as Draper edged out his Czech opponent in two hours and 23 minutes to set up a final clash against fifth seed Andrey Rublev on Saturday.
Former Arsenal boss Arsene Wenger was among those in attendance, but it failed to bring any initial luck for London-born Draper as Lehecka struck with his only break point of the first set to move in front.
World number 16 Draper has claimed eight victories from nine matches in 2025, with three of them five-set wins at the Australian Open to highlight his improved resilience.