It's not like I wake up and my whole body's sore, and just aching, and it's too much. Thank you so much'.
The former world number one, who is now ranked 230th in the world, has been battling to recover from a chronic hip condition but was forced to admit his efforts have not been enough.
Djokovic leads those 25-11, including a 4-0 record in finals at the Australian Open, where Murray has been a five-time finalist but never won the title.
'I want to get to Wimbledon and stop but I'm not certain I can do that'.
"I could live happily ever after with 99 too but if you are so close and knowing I am going to be playing this season I will give it a go!" "Been in a lot of pain for 20 months now". I'm always telling him that, you're a tough player to play against. "But I did see, it was very obvious for everyone, you didn't need to be on court to notice that he's struggling".
"I am surprised that I am still at this level - that I am able to stay in the top 10 but [not] that I am still playing tennis as such". But it's not just that.
Murray was surprised by the scrutiny levelled at Mauresmo during their time together. "It was a great event - I played some great tennis against [Alexander] Zverev". But I'm also not certain I'm able to do that'.
"Of course, it hits us top guys hard because we know Andy very well", the world number three said of the three-time Grand Slam champion and double Olympic gold medal victor. "Like, I get to the ball faster, and I'm not as sore", she said.
For that reason many pundits, including 18-time Slam champion Chris Evert, believe Williams is already the greatest of all time. So sorry you can not retire on your own terms, but keep in mind to look to the future.
She continued: "Your greatest impact on the world may be yet to come. Much love to you & your family".
The Murray gene pool seems pretty blessed, because his brother James Murray is also a successful professional tennis player and six-time Grand Slam doubles victor. You took the baton of Henman and boy, did you run with it.
"I have always wanted to play more attacking tennis".
He added: "Andy's been a sensational ambassador for Stirling". I have massive respect and admiration for your incredible career.
Murray and Djokovic have been seemingly tied at the hips throughout their stellar careers.
"But other than that, I feel like it's really individual, I think from person-to-person, how you react to different things".
Women's Tennis Association chief Steve Simon would like to have the same rules across all the major championships. "It's quite unbelievable how few female coaches there are across any sport". He's a legend of this sport, without a doubt - multiple Grand Slam victor, two golds from Olympic Games, Davis Cup.
Prime Minister Theresa May said: "Andy Murray has had a fantastic career and time and time again has made this nation proud... he will be remembered as one of the best and most successful athletes of his or any generation". He's been the ideal mentor to Fraser Murray and Ryan Porteous. "But in general until today, I had a good week of training and I still have a day to go". Everyone at Hibernian Football Club is rooting for him'.
He started playing tennis when he was just three years old, when his mother, Judy Murray, took him to play on their local courts.
Head teacher Lorraine Slabbert said she is "hugely sad" Sir Andy plans to retire this year as he has been a "huge inspiration".