Sabine Lisicki may not play again this season after being advised to take time away from court to treat a knee injury.

The world number 28, a Wimbledon finalist in 2013, has been struggling with the problem since before the US Open and has been receiving treatment in Germany.

Lisicki has now confirmed that she will play no part in the WTA's Asian swing, and may not return to action until the start of next year.

"Like most of you know I've been struggling with a knee injury before and during the US Open," read a statement on Lisicki's official website. 

"Ever since I got back to Germany I've been taken care of by Dr Muller Wohlfahrt and now Klaus Eder who have tried everything in order to get me ready for the Asian swing. But unfortunately my knee is not ready and I will not compete at tournaments this season.

"I have great support from my team and we are eager to get me back on the court asap. At the latest at start of next season."