Maria Sharapova successfully defends WTA Stuttgart title . She beats Stuttgart 's Maria Sharapova in Sunday 's final in straight sets . Sharapova is defending her Australian Open crown next month . Winner of China tournament also lands a Porsche sports car .
Maria Sharapova successfully defends WTA Stuttgart title . She beats China 's Li Na in Sunday 's final in straight sets . Sharapova is defending her French Open crown next month . Winner of Stuttgart tournament also lands a Porsche sports car .