Novak Djokovic has opened up on his new coaching adventure with Andy Murray - revealing all cards are on the table between the former rivals

The Serbian star sent the tennis world into a spin when he announced in November that Murray - a three-time Grand Slam champion - had agreed to coach him.

But Djokovic says Murray has many insights into his game, since the two first played each other aged 12.



The pairing will receive their first major test tonight at the Australian Open.

Djokovic takes on Nishesh Basavareddy in the first round on Rod Laver Arena from 9pm.