Venus Williams says she is not done yet

Seven-time Grand Slam champion Venus Williams has missed eight months in the past two years due to auto-immune disorder Sjogren's Syndrome, but she showed this season that she can still take on the best of opponents.

The American pulled off a stellar performance in Tokyo last week, beating World No.2 Victoria Azarenka and winning a pair of marathons against Simona Halep and Eugenie Bouchard to reach the semifinals, where she was just barely edged by Petra Kvitova, reports Xinhua.

Now she is hoping to score more at the China Open which started in the Chinese capital Sep 28.

"Perhaps I don't have the same health as my opponents, but I just get out there and hold my head high no matter what, and I try not to think about it. I just can't go out onto the court with any fear," said Williams Tuesday.

"The motivation for me is that I have a lot left to give. I haven't had a lot of good luck, so I know my luck's bound to turn. And when I sit at home and see tennis on TV, I know I can be out there."

Asked about dealing with Sjogren's Syndrome, she said physically it's getting better. "Since I came back to the tour last year, I've always been trying new things to improve myself, always trying to get an edge.

"In the beginning, I tried traditional medicine and different things, but I didn't think I was getting results, so I tried more untraditional things, and as of late I feel like I've been seeing better results with that. So for me the key has been to keep trying different things. It's like a tennis match - sometimes some things work and some things don't, and you just have to be patient with everything and keep fighting," she added.

Sjogren's syndrome is a chronic disorder of the immune system -- a long-term autoimmune disease -- in which the patient's white blood cells attack the saliva and tear glands, leading to dry mouth and eyes because the body's tear and saliva production is reduced. Others symptoms include arthritis.