Italian tennis player Jannik Sinner, currently ranked No. 1 in the ATP, has announced that he will miss the Masters 1000 tournament in Shanghai from October 7 to 18 due to a knee injury. Sinner has not competed since winning the Wimbledon title due to this issue. Although his absence in Shanghai is not expected to impact his ranking battle, as he was eliminated in the third round of the event last year, he has a significant number of points to defend in the final stretch of the season. Sinner's situation has raised concerns among tennis fans regarding his fitness and performance leading into the later matches of the year.