Djokovic has demanded new measures be put in place, the Serb unhappy at having to stay inside his luxury hotel room.
But Kyrgios has now hit out at the 17-time Grand Slam winner, calling him a ‘tool’ on Twitter.
“Djokovic is a tool,” he said on Twitter, sharing a video quote-tweeted by Ben Rothenberg.
“I don’t mind Bernie [Bernard Tomic] but his Mrs obviously has no perspective, ridiculous scenes.”
Djokovic wants fitness and training materials to be made available to all players, while also seeking regular testing.