[Image Source](https://statics.sportskeeda.com/wp-content/uploads/2016/11/2016-11-14t180440z_1_lynxmpecad16u_rtroptp_3_tennis-men-shanghai-800.jpg)Due to a knee injury, the Swiss player has decided not to attend the ATP 1000 tournament of 2019. The 34-year-old has not played since the US Open quarter-final and has not been able to appear in the tournament recently in St. Petersburg and Tokyo.