Sue Barker fears Novak Djokovic may be past his best as the tennis superstar targets an 11th Australian Open crown. And the former British number one claims Andy Murray is proving to be a distraction in his new role as the Serbian's coach.

The Australian Open’s new “coaching pods” have continued to raise eyebrows after a conversation between Novak Djokovic and his new coach Andy Murray left fans in disbelief.

Novak Djokovic and his new coach, Andy Murray, are taking advantage of a new setup at the Australian Open that gives players' entourages a chance to sit right next to the court in special four-seat pods.

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

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.

"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.

Andy Murray has been coaching Novak Djokovic at the Australian Open this month and has been left surprised by one aspect of the Serb's behavior away from the court.

Former American tennis player Ryan Harrison aimed a dig at Andy Murray during Novak Djokovic’s clash against Tomas Machac on Friday. Murray is currently working as part of Djokovic’s coaching team for the Australian Open after entering retirement following the Paris Olympics.