The former world No. 1, who last reached an ATP singles final at the Dubai Championships in March 2017, will face three-time Grand Slam winner Stan Wawrinka in the final in Antwerp after beating Frenchman Humbert 3-6, 7-5, 6-2. Wawrinka eased past 18-year-old Jannik Sinner in straight sets to book his passage into the final.
For Murray, it's his biggest success since having hip surgery in January, an injury that him contemplating retirement at one point. He sealed the win against Humbert after 2 hours, 22 minutes with an easy volley winner at the net.
"It's been a long road to get back to this point," Murray said. "I certainly didn't expect it to come so soon since I started playing again. It's been a big surprise to me and I'm happy to be through to the final."
Having played four tournaments in four weeks, winning eight of his 11 matches in that time, Murray appeared to struggle in the first set against Humbert, serving three double faults in the first six games -- allowing Humbert to break before going on to close out the opening set.
But it would be Murray who would go on to outlast his opponent. Looking to force a tie-break in the second set, Humbert served a double fault to hand the Brit the set, before Murray raced into a 3-0 lead in the deciding set, going on to close out the match.
Murray underwent career-saving hip surgery in January following the Australian Open, returning to play doubles -- winning the title at Queens before partnering up with Serena Williams at Wimbledon. He then returned to singles action in August at the Winston-Salem Open.
Information from The Associated Press was used in this report.