Andy Murray could REVERSE his decision to retire, jokes John McEnroe, despite the Scot coaching old rival Novak Djokovic at the Australian Open.

Andy Murray could reverse his decision to retire from tennis despite agreeing to coach his old rival Novak Djokovic, John McEnroe sensationally claimed.

Murray, a three-time Grand Slam champion, ended his brilliant 19-year career after withdrawing from the Paris Olympics last August.

Despite having also entered the world of golf, the 37-year-old almost instantly returned to the court to join forces with Djokovic at the Australian Open.

The two old enemies worked together during the off-season and in preparation for the tournament, which is now underway in Melbourne and runs until January 26.

This is Murray's first coaching role and the surprise nature of his partnership with Djokovic, one of his most notorious sparring partners, surprised McEnroe.

McEnroe, who won 155 career titles and is a 17-time Grand Slam champion in doubles and singles, also made a shocking prediction about the Scot's future.

Andy Murray will coach his old rival Novak Djokovic at the Australian Open

Murray ended his brilliant career in August before joining Djokovic.

John McEnroe has teased a possible U-turn by Murray despite his surprising new role.

“The training situation between Andy Murray and Novak Djokovic is funny, but it has to be one of the craziest things I've ever heard in my life,” he said. Eurosport.

“I remember being in Australia and hearing that Andy Murray was being trained by Ivan Lendl, my great rival and long-time nemesis, and I thought about it and said, 'Oh my God, this is going to work.'… But there's a big difference. of age.

'There's a week's age difference between Novak and Andy and he just stopped playing.

“My theory is that Andy will train Novak for the next few months and then he will find out everything he needs to know about how to beat Djokovic and then he will come back.”

Equally fascinated by the duo, former British number one Tim Henman added: “It's so early days that they've only had a few weeks to practice and head straight to a Grand Slam.

“It will be interesting to see how Djokovic plays and if Murray has any impact on his game, and to see how the relationship evolves.

“I don't think I have any of those answers, but we'll have to wait and see.”

Djokovic, a 24-time Grand Slam champion, won the Australian Open a record 10 times and defeated Murray in four finals in Melbourne.

Murray was photographed during a practice session ahead of Djokovic's first match on Monday.

The Scot said he hopes to help Djokovic become the greatest athlete of all time.

Djokovic won the Australian Open a record 10 times and defeated Murray in four finals

Murray now aims to help Djokovic become the greatest athlete of all time.

Before Djokovic's opening match, he said: “Novak has established himself in recent years as the greatest tennis player of all time with the records he has achieved.”

“In the next few years, if he can go out at 38, 39 years old and win more Slams, and beat Carlos Alcaraz and Jannik Sinner in important matches, he will have the right to be the best athlete of all time and it is exciting for me and his team be part of it.”

“In my opinion, watching his games last year, he was a little lacking at times,” Murray added. 'But there wasn't one at the Olympic Games.

'The injury at the French Open, just before the Olympics, probably caught his attention. He had a great Wimbledon, a difficult final there, but after knee surgery, it's an incredible result.

“When he was fully motivated and fully focused, he won the Olympics.”

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