Carlos Alcaraz fumed at the umpire at the China Open in his opening match against Giovanni Mpetshi Perricard.
The French Open and Wimbledon champion claimed victory over the Frenchman on Friday - but not everything went his way.
In the opening set, Alcaraz was given two time violations that saw him lose his cool.
Usually quick with the draw, an automatic shot clock found the 21-year-old guilty of taking too long which led to the umpire punishing him.
Carlos Alcaraz was furious with the umpire at the China Open
Sky Sports
Alcaraz turned to the umpire and shouted: "This is not tennis!"
There were echoes to his Queen's Club Championships rant earlier this year where he crashed out to Britain's Jack Draper.
"I'm always very quick, I never get warnings," Alcaraz vented. "You gave me two in one set. It's impossible to play tennis like this."
Despite being 0-40 down in the first game, the Spaniard rallied to win every point and eventually claim a 6-4 6-4 victory.
But after the first set, Alcaraz was still blowing steam as he escalated his complaints to the umpire.
JUST IN: Lewis Hamilton sends one-word message to Daniel Ricciardo as F1 hero releases emotional statement
It is not the first time that the world No. 3 has fumed at the ATP's rules over time violations.
After losing to Draper earlier this year, Alcaraz raged after in his post-match press conference.
He said: "Yes, absolutely [I felt rushed].
Carlos Alcaraz was still furious after the first set
Sky Sports
"I mean, he told me that there is a new rule, this new thing, that the clock never stops. After the point is finished, the clock is putting on.
"I think for the player it is something bad. I mean, I finish the point at the net, and I had no time to ask for the balls.
LATEST SPORT NEWS:
"I mean, I'm not saying to go to a towel and taking my time. I feel like I can't ask for the balls. It's crazy. I have time just to ask for two balls and no bounces.
"I think I have never seen something like that in tennis.
"If you play a long point or finish at the net, you have time just to go for a towel or ask for your routine, ask for, in my case, four balls, I'm concentrating for the next point, just bouncing my bounces, and serve as best as I can."
You may like
