Kyrgios has several times before lost it completely on the tennis court and has been threatened with suspension.
During the Murray River Open in Melbourne Park, he demanded assurances not to be fined by the ATP for continuing to play in the tournament.
Kyrgios struggled with problems in his left knee in his first tournament in just over a year due to the pandemic.
- I can not serve without pain. I can not stand on my own two feet. I serve at 170 km / h instead of 220 m / h, he was heard complaining to the coach.
The Australian was warned of several swear words at 4-4 in the second set against Borna Coric. When the Croatian then broke his serve, Kyrgios dropped everything and hauled the racket away once more.