Controversial tennis star Nick Kyrigos has taken to Twitter to vent about another player throwing a racket and not receiving a sanction.The culprit this time was Australian tennis player Daria Gavrilova, who represented Russia before emigrating Down Under in 2015.Gavrilova is the former world junior number 1 and a star on the rise having broken into the Top 20 rankings in August of last year.She has so far taken one WTA singles title and one WTA doubles title and has recorded a number of victories against Top 10 ranked player such as Maria Sharapova and Angelique Kerber.Her meltdown came in a rollercoaster of a first round match at the Mexican Open in Acapulco against American Madison Brengle.She narrowly avoided dismissal from the tournament when she threw her racket towards the umpires chair after being broken in the second set - missing a ball boy by a matter of inches.According to regulations, she would have been thrown out of the tournament had the racket made contact with the ball boy. She can thank her lucky stars that the young man was diligent enough to move from his position to retrieve a ball before her outburst.Fellow Australian Kyrigos captioned the video evidence from @Ashish_TV with his opinion that: "I would be banned for 6 years and been on every paper and news channel for the next month."Kyrigos is of course never far from controversy himself, having a long rap sheet of crimes including 'tanking' to intentionally lose matches, verbally abusing other players, and unsportsmanlike conduct.

His outbursts include making lewd suggestions about Stan Warinka's girlfriend during a 2015 Rodger Cup match, for which the ATP handed down a 28-day suspended sentence, to expire after six months, and a $25,000 fine.

At the same tournament, he received a $3,281 fine for a comment he made to a ball person.

Among his various punishments, Kyrigos was also fined $4,926 for audible obscenities and racket-smashing at his home tournament the Australian Open in 2015.

Maybe Daria Gavrilova has been taking notes?

Gavrilova came through her match 4-6, 6-3, 6-3, but managed to pick up two penalty points - one for taking too long in the bathroom between sets, and another for stalling when she returned to the court.

According to Kyrigos, Daria should be thankful that she is progressing in the tournament at all.