The Serb's ex-head coach, Goran Ivanisevic, parted ways with Djokovic last year and admitted that being the head coach of such a demanding figure is not for everyone. The former Wimbledon champion said that there's a ton of pressure when it comes to coaching Djokovic.

Novak Djokovic and Andy Murray have known each other for a quarter of a century. They played from the age of 12, meeting 36 times as professionals, including 10 Grand Slam matches.

When Novak Djokovic rang Andy Murray in the middle of a round of golf to ask the former No.1 to be his coach, the Serbian champion was very clear about why. “He wanted an opponent to coach him,” Murray says. “I was shocked, obviously. I had no interest in doing any coaching at that moment. I’d retired. I was really enjoying my home life.