LONDON - Andy Murray title bid was ended in five sets by American Sam Querrey after the 30-year-old showed clear signs of physical discomfort as the match progressed on Centre Court.
The Brit managed to pull two sets to one in front, but struggled to move freely thereafter and collapsed to a pair of 6-1 defeats in the final sets as the battle lost its competitive edge.
Murray went into the Championships suffering with a hip problem and withdrew from two matches at Hurlingham Club in the week before Wimbledon.
He dropped just one set to reach the last eight, but hopes that the problem was easing as Murray went deeper into week two were dashed as Querrey wrestled control of the quarter-final.
"You have to give Querrey credit for the level of tennis he played but obviously there's a big question mark over what has been Murray's fitness over the past three or four weeks," Former British number one, Tim Henman told the BBC.
"His hip is one of those things where you are hoping that, if you have got a niggle, it gets better as the tournament goes on but to see him in so much discomfort it was pretty evident that it's deteriorated," he added.
Querrey became the first American man to reach the semi-final of a Grand Slam since Andy Roddick in 2009, and continued his own best run at a major event by advancing to the last four.
"I'm still in shock," Querrey told the BBC after the match.
"The last point, I was so happy to hit the serve in. I'm thrilled right now. I didn't start my best, I kept with it, kept swinging and found a groove in the fourth and fifth sets and everything went my way from then. It feels great," he added.
"This is a dream come true and to do it at Wimbledon makes it a little more special. I'm going to enjoy this one a little bit have an easy day tomorrow and just get ready for the semis," he said.