Serena Williams to play Jelena Jankovic in China Open final

Serena Williams overcame a back injury to reach the China Open final where she will play Jelena Jankovic.
The world number one walked off court clutching her back during the second set of her semi final but returned to complete a 6 2 , 6 2 victory over Polish third seed Agnieszka Radwanska.The 32 year old American said:"My back was a little tight from playing a lot so I was just trying to release it."