There have been theories thrown out there as to why Djokovic made his coaching decision, but seven-time major champion John McEnroe offered a pretty hilarious theory this weekend.

Novak Djokovic was left feeling embarrassed as he was put on the spot in a quiz about his new coach, Andy Murray. The 24-time Major champion recently added his old rival to his team and Murray has joined him in Melbourne for the Australian Open.

If Novak Djokovic can win a 25th major title in the coming days, he will bolster his claim to be considered the greatest athlete in history, according to his new coach Sir Andy Murray.

Novak Djokovic got the bright idea to hire the recently retired Andy Murray as his coach, at least through the Australian Open.

John McEnroe has joked that Andy Murray agreed to coach Novak Djokovic so he can discover ways to beat the Serbian. The American teased that Murray would then come out of retirement and use the knowledge to get the better of the 24-time Grand Slam champion in a showdown on the court.

And Murray is confident more major silverware will follow for Novak Djokovic, who he thinks can establish himself as the best athlete of all time

"I know this court well. I have never managed to win the title here and this man - indicating Djokovic - is the only one responsible. Now I am here to try to sabotage him so that he does not win another Australian Open!" said Murray before telling the story behind the new collaboration.

It will be all business when Andy Murray coaches Novak Djokovic at the Australian Open. While the partnership between two of the biggest rivals in recent men’s tennis history has awakened feelings of shock,

If Novak Djokovic Wins Australian Open, Andy Murray Would Be ‘Flooded With Coaching Requests,’ John McEnroe Says

John McEnroe saw the funny side of Andy Murray joining Novak Djokovic's coaching team, floating the idea of Murray returning with fresh knowledge of his rival.