If you've watched enough of Nick Kyrgios' tennis, you'll know he's not one to shy away from speaking his truth.
And that was no different early in his first round match against Jacob Fearnley at the Australian Open on Monday night.
The Australian began chirping early in his match towards his coaching box and the crowd, who seemed to be giving it right back to him.
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In an outburst full of expletives, Nine's Todd Woodbridge was forced to apologise, as Kyrgios scrambled to recoup for the second set.
But his head was thrown elsewhere yet again, as the crowd picked up their chat.
"Just like the Celtics, Nick," someone in the crowd yelled.
Nick Kyrgios of Australia reacts against Jacob Fearnley of Great Britain. Getty
Kyrgios is a Boston Celtics fan, and his side have not hit heights in the NBA in the last year.
And that was just the beginning of an agonising opening two sets, as he looked to be battling an injury around his rib and abdominal area.
Add to it that Fearnley was pushing the 29-year-old with every serve, it was a disaster waiting to bubble over.
Nick Kyrgios went off at his box. Nine
Kyrgios' big serves were also coming back to him with fire on them from the Brit.
"That must really infuriate Kyrgios that this guy is just attacking his serve. He's doing damage with those returns," John McEnroe said on Nine.
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And Fearnley didn't waste his chances, nabbing the first set 7-6 (7-3).
The pain continued for the Australian as he went on to lose the second set convincingly, with Fearnley capitalising 6-3.
