I always had a powerful serve. It's one of the best in women's tennis. It's very good to have a weapon like that.

What I've accomplished for myself is beyond my wildest dreams. What I accomplished for my country is one of my most proud achievements.

I look forward to competing.

After four knee surgeries and hundreds of shots injected into my knee weekly to alleviate swelling and pain, my body is begging me to stop the pounding.

China tennis - we're getting bigger and bigger.

I don't know how many years I can still play. I have to listen to my body and see how it feels.

Just because you win the French Open it doesn't mean you can do well at Wimbledon .