Wawrinka gave up the Shanghai Masters
![](https://steemitimages.com/640x0/https://cdn.steemitimages.com/DQmY2x6XYaSEqirGPKLCs19JhTtmduhZV9uhPrwQhNsxYaM/image.png)
Image Source
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.