Jannik Sinner withdraws from Shanghai Masters – and could lose world No 1 status to Alexander Zverev

Jannik Sinner has withdrawn from the Shanghai Masters due to a knee injury, having not competed since winning Wimbledon. His absence from the tournament puts his world No 1 ranking at risk, as Alexander Zverev could overtake him depending on results. The Shanghai Masters represents a significant points opportunity that could shift the top of the ATP rankings.