CNN  — 

Nick Kyrgios is not letting this one go.

The Australian tennis star is once again caught up in a spat with a fellow player after Dominic Thiem defended those who took part in the controversial Adria Tour.

A host of stars – including Novak Djokovic – tested positive for Covid-19 after competing in the tournament which attracted large crowds and where social distancing wasn’t in place.

Alexander Zverev was another to take part in the event and, despite his negative test, announced he would self-isolate as a precaution.

However, a video emerged on social media a few days later appearing to show the German partying in a Monte Carlo nightclub.

Despite this, Thiem seemed to take issue with Kyrgios for criticizing Zverev, telling Austrian media that the youngster had just made a “mistake.”