Watch: Jannik Sinner Reveals Relationship Status After Brooks Nader Dating RumorsNovak Djokovic isn't sugarcoating what he thought of Jannik Sinner's doping scandal. More than a year after the 2025 Vienna Open winner tested positive for having performance-enhancing drug Clostebol in his system and subsequently accepted a three-month ban from the sport, his fellow tennis player reacted to the confusing chain of events. For Djokovic, the controversy felt similar to his own drama in 2022, when he was deported from Australia for refusing to get the COVID-19 vaccine.