Jannik Sinner’s coach Ricardo Piatti said Novak Djokovic may only play one Grand Slam tournament this year. At the moment, the French Open seems to be the only Grand Slam where players would be allowed to play without being fully vaccinated. “Djokovic may play only one Grand Slam this year: French Open. You must be vaccinated to play in UK (Wimbledon) and outside Europe (Aus Open, US Open),” Piatti said, per Tennis Up To Date. Meanwhile, Australian Open tournament director Craig Tiley said in the coming days we should have a clerer picture regarding Djokovic’s participation at Melbourne Park. “As far as the status relates to Novak, we will have a much clearer picture in the coming days,” Tiley said. “Otherwise, it’s getting pretty late for him to show up and play in the Australian Open. “What I am aware of is the same as everyone else. Novak’s …