The top seed comfortably won the first set 6-2, but he took just 10 of 22 points on his serve in the second as Simon fought back 6-3. Murray recovered to break early in the decider, and came through 6-2 in a match which lasted one hour and 53 minutes.
Murray will now face the American world No55, Donald Young, in a rematch of their US Open fourth-round match, which the Scot won comfortably.
Andy comments and quotes below
“I’m excited, I’m stoked, all the words that mean you’re happy to be in my first final,” Young said after beating the second seed, Gaël Monfils, 4-6, 7-6 (7-5), 7-6 (7-5). “I’ve seen a lot of my peers make finals and I’m happy to be in my first one.”
The 22-year-old trailed 4-1 in the third set, but fought back to force a tie-break and earned match point with a successful Hawk-Eye challenge in two hours and 46 minutes.
“It’s great to beat a top-10 player of the calibre of Gaël,” Young added. “Lately in the big matches I’ve won I’ve been down and I’ve had to come back. I’m just trying to fight and not give up and it pays dividends at the end of matches.”