France's Michael Llodra got involved in a spat with the umpire at the French Open on Monday and went on to suffer a first-round defeat by Belgian Steve Darcis.
Llodra, the 22nd seed, complained that a fan was moving around in the stands and lost his temper with umpire Mohamed El Jennati, who gave him a warning.
"I don't think the umpire was doing his job," Llodra told a news conference after the 6-7 6-3 6-3 6-3 defeat.
"He should have called security or told that person to stop moving around. Security should have done their job.
"I mean, I had seen this person for a long time already. It's too easy to give me a warning. It was useless. And of course it's not pleasant to get a warning."
Llodra, however, said the incident was not the reason why he lost the match.
"It's something that happens in a match. That is not the reason why I lost," he said.
Organisers said they would not comment until they had fully considered the matter.