Anna Kalinskaya delivered a brutal backhander to Nick Kyrgios after confirming their relationship had come to an end.
Kyrgios and Kalinskaya were an item for months but things appear to have ended on bad terms.
In March the Daily Mail published pictures of Kyrgios and Russian player Kalinskaya hanging out in Acapulco after the Aussie retired hurt at the Mexican Open with a wrist injury.
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The photos showed Kyrgios planting a kiss on Kalinskaya’s forehead as they ate tacos together.
However the Russian player has since confirmed that they are no longer together, taking a brutal swipe at Kyrgios in the process.
“We broke up. We aren’t friends,” Kalinskaya told fans earlier this week.
“I understand you are his friends and it’s cool but I’m not going to talk about him. Have some respect for me as well please.”
Kalinskaya had earlier captioned an Instagram post with “f***ing energy vampire”, while another post read “you’re not a bad boy, you’re simply a bad person”.
Kalinskaya had featured heavily on Kyrgios’ Instagtam story over the last few months.
Rumours started swirling last September when Kyrgios shared a photo of himself with Kalinskaya, writing: “My face when I see you doing your thing today.”
He was also spotted cheering her on from the stands at the Citi Open in Washington last August.
Tennis great’s hope for Kyrgios glory
Meanwehile, tennis enigma Goran Ivanisevic wants the naughty Kyrgios to reconcile with the outrageously-gifted Kyrgios to ensure he becomes a grand slam champion.
Ivanisevic remains the only player in history to win Wimbledon as a wildcard, having famously harnessed the talents of “good Goran with bad Goran” for his historic march to the 2001 title.
Three-times a Wimbledon runner-up before breaking through with a titanic victory over Pat Rafter, Ivanisevic was ranked a lowly 125th in the world when he finally prevailed at The All England Club.
Tellingly, the Croatian hot-head said that was the first time he'd felt at peace on court, having struggled to control his emotions during a truly turbulent career.
“I was able to separate these two things: good Goran and bad Goran and they were helping each other for the first time,” Ivanisevic told the Australian Open YouTube.
“Usually they were against each other and they created a lot of bad losses, a lot of stupid losses.”
Almost 20 years on and now part of Novak Djokovic’s coaching team after guiding countryman Marin Cilic to 2014 US Open glory, Ivanisevic sees a lot of himself in Kyrgios, tennis's modern-day Jekyll and Hyde.
And he believes the new and improved Kyrgios showed enough during his cool run to the Australian Open fourth round to suggest the 25-year-old is also on the way to parlaying his enviable potential into grand slam spoils.
“He has some issues deep down - he is the worst for himself and I know how he feels. He is fighting with 100 people, sometimes he wants to prove something that is impossible to prove,” Ivanisevic said.
“But there is no sense to talk about his talent because he is one of the biggest talents. He is the guy who can win grand slams. He can beat anybody any day.
“He is, for me, the best server in the game. He can do whatever with the ball.”