Novak Djokovic didn't hold back when expressing his thoughts on the ongoing doping case involving world No. 1 Jannik Sinner.

Novak Djokovic has spoken again about the doping case involving Jannik Sinner, and he did so from Shanghai, where the ATP 1000 tournament has begun, in which the Italian will also compete.

Novak Djokovic says the ongoing doping case involving world No. 1 Jannik Sinner is “not helping tennis at all."

Novak Djokovic reacts to Jannik Sinner twice testing positive for a banned substance earlier this year, with an independent tribunal allowing the world No. 1 to continue playing.

"I think it's quite obvious that we have a system that is not working well," the Serbian champion said as he lobbied for change to the doping protocols.

Novak Djokovic bemoaned 'the system' and said he just wants Jannik Sinner's doping situation resolved quickly

Novak Djokovic has given his reaction to the World Anti-Doping Agency’s decision to appeal the “no fault or negligence” verdict reached over Jannik Sinner’s failed drug tests. The International Tennis Integrity Agency (ITIA) announced last month that Sinner would not receive a ban for failing two anti-doping in March after an independent tribunal ruled he was not to blame.