Andy Murray has taken up a coaching role with Novak Djokovic following his retirement from playing, but doubts have been raised by a top coach over the Brit's worthiness

Andy Murray has been announced as 24-time Grand Slam winner Novak Djokovic's new coach, but one of his adversaries isn't convinced.

In what was a huge surprise to tennis fans, Novak Djokovic recently announced that former player Andy Murray would be assigned as his coach from the upcoming Australian Open next year.Murray retired after the Paris Olympics this year,

Andy Roddick made a huge revelation about the Novak Djokovic and Andy Murray partnership as the 2003 US Open champion shares he was told that the newly retired Briton rejected multiple offers from "top male and female" players before accepting the Serb's invitation to work with him.

Andy Murray competed against Novak Djokovic at the highest level for over a decade and will now aim to guide him to success - but Nicolas Mahut fears there could be tension between the pair

"It’s time for one of my toughest opponents to step into my corner. Welcome on board, Coach — Andy Murray,” Djokovic said

Former two-time French Open finalist Alex Corretja admitted he was in "total shock" when the Novak Djokovic and Andy Murray collaboration news dropped but also backed the partnership to succeed.

Recently retired Andy Murray is going to team up with Novak Djokovic, working with him as a coach through the Australian Open in January.

Novak Djokovic ’s decision to hire Andy Murray has been branded an “act of war”. The former rivals shocked the tennis world over the weekend, announcing that the newly-retired Brit would coach the 24-time Grand Slam champion during the off-season and Australian Open.