• World No 7 will train with former rival at Australian Open
• Veteran still critical of Sinner and Swiatek doping cases

Novak Djokovic admits it has been “strange” to have Andy Murray working as his coach but believes he will benefit from one of his greatest rivals taking a “fresh look” at his game.

The 24-time grand-slam winner also spoke of his frustration at being “kept in the dark” over Jannik Sinner’s doping case, accusing the game’s authorities of double standards and a lack of transparency.