Anguish etched across his face, the world No.3 crashed out 6-3, 6-7, 7-6 against the big-serving Canadian to lose his Tokyo title.
The slouching, hang-dog demeanour, wild-eyed screaming and racket abuse were a flashback to the bad old days before Murray got his mental game under control and a grand slam under his belt.
Murray came into the event as the hottest player in the men’s game, having reached his first Wimbledon final, crushed Roger Federer to win Olympic gold in London and captured a maiden grand slam title. But the demons that haunted him in losing his first four major finals resurfaced in Tokyo.
Murray blew a 4-1 lead in the third set and then two match points with Raonic serving at 6-5 down, triggering a furious tantrum from the Scot.
“There was always going to be a bit of residue from the last few months,” Murray said later. “Ideally I wouldn’t have liked to start the match like that.”
After blowing away the cobwebs by beating Ivo Karlovic in his opening game, Murray had said becoming a member of the grand slam club had made him a more “responsible” player.
“I was so obsessed with winning a grand slam, sometimes in certain matches I haven’t done myself justice,” said the Scot.
“I felt after the US Open [I needed to] reset some goals. I was always focusing on the next grand slam rather than every tournament and every match I played. Now I feel like I can hopefully concentrate better, take more responsibility for my performances in every tournament throughout the year.”
It failed to pan out that way in his first event since ending Britain’s 76-year wait for a men’s grand slam singles champion.
Murray, who beat Raonic 6-4, 6-4, 6-2 in the fourth round of the US Open last month, had been accused of choking in the past, particularly after his first four grand slam finals.
It would be harsh to throw that accusation at Murray after losing a semi-final in his first event since New York but the way his game fell apart will worry him.
Murray tried to put it down to a few missed points but he allowed Raonic to bully him early, winning just 20 per cent of his second serve points in the first set.
Murray said he would quickly put things right at the Shanghai Masters. “I need to focus on Shanghai – it’s a big tournament,” he said. “The Paris [Masters] and then the [year-ending] Tour Finals in London. That’s the main goal.”