Jannik Sinner faces a tough draw in the final ATP 1000 Masters of the season in Paris, while Carlos Alcaraz has been given an easier path.
Jannik Sinner beat Novak Djokovic in the final of the Shanghai Masters to secure his seventh title of the year.
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.