A hip injury seemed to have affected on the world number one as he lost his quarter-final to Sam Querrey.
And his fellow Scot thinks Murray might consider a lay-off if he cannot be fit for the US Open in six weeks’ time.
“It has to all be about major titles, so if he can’t be 100 per cent for that, the next chance is Australia,” he told BBC Scotland.
“So if he thinks getting 100 per cent fit for that to have a chance of the title is a question of having three or four months off then I’m sure he won’t be ruling that out.
“To have a bit of a break from the tour, get the body right, spend a bit of time at home with the family - he has a second child coming - maybe that will actually re-energise and put him in a fantastic position for the next three or four years potentially to challenge for these big titles.
“But we don’t know - and he probably doesn’t know - how bad the injury is at this point.”
Murray admitted that he and his coaching team had been looking “short-term” to enable him to defend his title but would now have to take a longer-term view.
The 30-year-old attracted praise from his mum after calling out a reporter who appeared to ignore the success of America’s female tennis players.
Murray corrected a journalist who said Sam Querrey was the first US player to reach a major semi-final since 2009.
The world number one responded: “Male player.”
The comment was made in a post-match press conference after defending champion Murray crashed out of Wimbledon’s quarter-finals.
Judy Murray posted “That’s my boy” along with a heart emoji, after re-tweeting the comments.
First Minister of Scotland Nicola Sturgeon also praised the defeated British star, tweeting: “What a star @andy_murray is - on and off the court.”