The UK No.1 confirmed in a Facebook post early on Monday afternoon that he has undergone surgery to fix his ongoing hip injury and will be out of action for around 14 weeks.
"I'm going to take my time to make sure that the rehab is done properly, and make sure that the surgery is as successful as it can be", he said. He added that he's not finished playing yet and will be back competing at a high level.
The three-time grand slam victor has been given a timeline of around seven to eight weeks to hit a ball on the court again, and around 14 weeks for a return to competitive play after this specific kind of surgery.
"I'm very optimistic because, having spoken to the surgeon, he was very happy about how it went".
Murray has not played competitively since being knocked out of Wimbledon in July and was forced to pull out of the Australian Open which is due to start on January 15.
A return in time for the grass-court season, which includes Queen's - a tournament he has won five times, would enable him to target a third Wimbledon title but would come after nearly a year's absence on the tennis scene.
Murray's lengthy layoff has seen him slide down the ATP world rankings to No 19, but a return to top spot is far from a priority at present, instead focusing first on his rehabilitation before ensuring he is in the best possible condition for the four grand slam tournaments. O'Donnell said that Murray's hip would be better than it was a year ago, and that was when he was world number one.
Murray said: "I've been fairly competitive with top-50 players in the world practising in Brisbane when I was struggling to move". I want to come back when I'm fit and ready to play, not to get into a situation like in Brisbane or New York (US Open, 2017), where I'm unsure when I turn up at a tournament how fit I am.
"I'll come back from this". "Now it's time to give my body the recovery and rest I need".
"In terms of the approach to my career, I'm certainly not going to be putting in the same amount of tournaments and effort to try to get to No1. The surgery allows me to extend my hip well, and I'll be able to sprint".
"I went in at 7:30 a.m. [Melbourne time] and I woke up from the operation about 10:30 a.m.", Murray said, according to the Guardian.
He concluded: "I'll come back from this".