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.

Former eight-time Grand Slam champion in doubles Nenad Zimonjic underlines that Novak Djokovic is "a smart guy" and therefore knows extremely well why he added Andy Murray to his coaching staff for the Australian Open.

Former tennis rivals Andy Murray and Novak Djokovic have entered an unexpected new era, as the two recently announced that Murray is set to coach Djokovic for the Australian Open.

BBC tennis correspondent Russell Fuller assesses what Novak Djokovic's shock appointment of Andy Murray as coach could mean for both men.

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.

By Charlie Eccleshare, Callum Davis and Matthew Futterman Novak Djokovic has appointed his former rival and three-time Grand Slam champion Andy Murray as his new coach. Murray, 37, called time on his illustrious 19-year career after the Paris Olympics in August but is returning to tennis to help the 24-time Grand Slam winner’s preparations for the Australian Open,

Novak Djokovic announced that Andy Murray will be his coach for the offseason and Australian Open in a post to social media on Saturday.

One of Novak Djokovic's closest friends does not expect Andy Murray to cause any problems as part of the Serb's coaching team at the Australian Open. Last week, it was confirmed that Murray had agreed to coach Djokovic during the off-season in a surprise development.

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