All eyes will be on Kyrgios next week when he begins his US Open campaign following his outbursts in Cincinnati, which he’s still awaiting full punishment for.
Kyrgios clashed with umpire Fergus Murphy, verbally abusing the official and committing several acts of unsportsmanlike conduct.
The Australian was fined $113,000 (£93,000) for his antics but could be in line for a suspension.
Kyrgios’ behaviour has been widely condemned but his unpredictability means a repeat incident cannot be ruled out.
And Wilander believes the 24-year-old must channel his emotions in a more professional way to get the best out of himself.
“I hope he doesn’t behave like he did in Cincinnati,” Wilander said.
“I think that every week that passes is showing more and more interest in wanting to win tennis matches and wanting to improve everything around him.
“I think when he did what he did in Cincinnati, of course it looks bad and, of course, there are children in the stands and the language is bad, but at least the way he is now in the last weeks, he is showing that he cares.
“Nick wants to win, he hates losing and he wants to play well, he wants to entertain and he simply hasn’t been able to deal with it in a professional way.”
Former British No 1 Greg Rusedski called on Kyrgios to seek help to
“Last time he got pushed out of the game and had to take time away from it,” Rusedski said on Amazon Prime.
“You look [now] and did that really work? He hired a sports psychologist, did it make a difference in his behaviour?
“I think he needs a regular therapist to deal with other issues so he can behave himself on the court.
“And he has to believe in these things because he is such a talented player. But his performance on the court was unacceptable.
“The way he was with Fergus Murphy, especially spitting at the end, was not good for our sport and he needs to clean that up. So this could be a long suspension.
“But he needs help to get back to become the player he should be and the person he is off the court.”