Jannik Sinner primed for ‘tough challenge’ of defending Shanghai title
World number two Jannik Sinner said on Thursday that he anticipates “a very, very difficult and tough challenge” as he prepares to defend his Shanghai Masters title, a day after winning the China Open. The 24-year-old Italian dominated teenager Learner Tien to clinch his 21st ATP title in Beijing on Wednesday, before travelling down to…