Serena Withdraws in China; Sharapova and Ivanovic to Meet in Semis
A knee injury forced Serena Williams out of the China Open on Friday, just before she was set to take on Australia’s Samantha Stosur. The withdrawal sends Stosur into the semifinals as Serena has withdrawn for the second straight tournament after leaving Wuhan with a viral illness. “It’s really frustrating, especially having to retire from…

