Stan Wawrinka out for the rest of the season due to knee injury

Stan Wawrinka will not defend his US Open title in New York later this month because of a knee injury.

The 32-year-old Swiss confirmed the news via an update on his Facebook page on Friday, as he announced that he will return to action in 2018.

“I am sad to announce that after talking with my team and doctor I had to make a difficult decision to undergo a medical intervention on my knee,” Wawrinka wrote on Facebook.

“This was the only solution to make sure I will be able to compete at the top level for many more years.

“This is obviously extremely disappointing, but I’m already looking
ahead and planning my recovery. I love this sport and I will work hard to get back to my top level and play many more years.

“I also want to take this opportunity to thank my fans for sending plenty of messages of support during the last couple of days. I will see you all in 2018!”