Tennis great Rod Laver has called for Nick Kyrgios to be suspended from the ATP Tour over bad behaviour, saying his fellow Australian appears not to be learning from his mistakes.
The explosive and temperamental 24-year-old Kyrgios has a history of notorious outbursts and is being investigated for potential rule violations after calling the ATP Tour "corrupt" during the US Open last week.
While he later backed away from the comment, it followed a record US$113,000 fine issued to him by the ATP for his actions at the Cincinnati Masters in August.
During that meltdown, he smashed two racquets and described an umpire as a "tool", with his sanction including fines for ball abuse, leaving the court without permission, an audible obscenity and unsportsmanlike conduct.
Kyrgios was warned that he could also face suspension.
Laver, considered one of the sport's greatest players, said time away from tennis could be the answer.
"Whatever they have done hasn't worked so far, so maybe a suspension is the only answer," he told The Sydney Morning Herald on Wednesday.
"I'm not sure he's learned anything from any of the things that have gone on."
The talented Kyrgios, who is due to play in an event named after Laver -- the Laver Cup -- in Geneva later this month, has been controversial for much of his career.
"Nick is Nick, unfortunately," Laver said.
"He could have been, or still could become, a world champion because of his serving ability, his game.
"But his brain gets in the way. He doesn't want to adhere to the conditions or the umpire."