Nick Kyrgios has some new beef, but this time it’s not with Rafael Nadal or Novak Djokovic.

In an interview with Swedish tennis website Tennisportalen, Casper Ruud made some choice remarks about Kyrgios, in which he called the Aussie “completely crazy” and that he had behaved like an “idiot” on court.

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Ruud was referencing their most recent encounter in Rome, where Kyrgios, in an accidental homage to the great Bobby Knight, threw a chair on the court and was promptly defaulted from the match.

Kyrgios slammed back on Twitter. 

Flip the Pages to see the incident in question and more: