Why world No.1 Sinner cannot afford to skip the Asian swing despite his injury

 Jannik Sinner faces a key comeback decision after missing the US Open with a knee issue. He could return in Beijing and Shanghai, where heat and humidity have previously troubled him, or wait until Vienna. Delaying his return could protect his fitness but give Alexander Zverev a chance to reduce his ranking deficit before the ATP Finals in Turin. Jannik Sinner faces a key comeback decision after missing the US Open with a knee issue. He could return in Beijing and Shanghai, where heat and humidity have previously troubled him, or wait until Vienna. Delaying his return could protect his fitness but give Alexander Zverev a chance to reduce his ranking deficit before the ATP Finals in Turin.