Carlos Alcaraz clinched the China Open title in Beijing by ending Jannik Sinner's winning streak in the final.
World number one Jannik Sinner said he was "very disappointed and also surprised" to be facing the renewed threat of a doping ban.
World number one Jannik Sinner is facing the renewed threat of a ban after the World Anti-Doping Agency launched an appeal against a ruling of "no fault or negligence" for two positive tests he returned in March.
Jannik Sinner believes entering a new era of champions is "good for the sport".
US Open winner Jannik Sinner believes entering a new era of champions is good for tennis.
Jannik Sinner was proud of his mental strength after putting his doping scandal behind him to win the US Open for the first time.