Damir Dzumhur let loose on the umpire during his second-round Vienna Open defeat to Jo-Wilfried Tsonga yesterday.
The Bosnian had found himself all but defeated in the third set, 5-1 down and facing Tsonga's serve.
His frustration came to a head on the very first point of the game as his opponent's serve left him unable to make a solid return.
Instead of then setting himself up to play out the point, the world number 31 just lazily sulked towards the other side of the court, completely giving up on any attempt to win the point.
It was a bizarre and unsightly play that drew boos from the crowd.
The umpire then proceeded to criticise Dzumhur for his effort, and rightly so, actually bothering to try is in the tour rules after all.
Dzumhur took offence to this, arguing with the umpire and drawing further opposition from the watching public.
"The ball was here," Dzumhur can be heard shouting as he points to where the ball landed.
"What should I do? What did I do wrong? What did I do wrong? What did I do wrong? What?"
"This is what I did wrong because the ball was here [holding his racket in front of his face where Tsonga's serve had bounced]. I cannot play how I want, huh? I have to play how you tell me."
The crowd booed, Dzumhur looked incredibly frustrated, and Tsonga tried to continue.
It was an absolutely ridiculous situation that was made even more ridiculous by the fact that Dzumhur had actually won the point.
He had casually batted his return into the air, setting up an easy shot for Tsonga, so easy that Dzumhur gave up and slowly walked into position for the next serve.
The Frenchman, however, proceeded to smash the shot very hard into the net, handing his opponent possibly the most low-effort point imaginable.
Tsonga went on to see out the final game to 30, moving on to the third-round to face top-seed Sascha Zverev. Džumhur wasn't quite finished though, arguing his case vociferously after the match - if only he'd put that much effort into the point.