Novak Djokovic received a warning from Tennis Australia on Thursday after his father Srdjan was seen on video taking part in a demonstration supporting Russian president Vladimir Putin, according to The Telegraph.
The governing body in charge of the ongoing Australian Open reportedly warned Novak Djokovic, who is Serbian, and his family to not promote any more political causes.
In the video, Srdjan can be seen standing with the ringleader of the demonstration while holding up a Russian flag with Putin's face printed on it. He is translated in the video as saying "Long live the Russians," while the ringleader sends messages of support to a pro-Putin Moscow biker gang and Russian presences in the war in Ukraine.