Jannik Sinner secured the end-of-year ATP number one ranking by reaching the Shanghai Masters final with 6-4 7-5 win over Tomas Machac.
World number Jannik Sinner was delighted to come through a 'very tough match' against Tomas Martin Etcheverry at the Shanghai Masters on Sunday.
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".