Cramped-up Jannik Sinner retires from Shanghai Masters match with Tallon Griekspoor
Tennis Tracker: Anisimova wins China Open, Djokovic through in Shanghai, Sinner retires
Anisimova downs Noskova to win China Open and claim second title of season
The Base Line: Anisimova clinches Beijing title as Alcaraz and Sinner continue domination