WUHAN, China "Keep your eye on the ball and swing your racket," retired Chinese tennis star Li Na called out as she taught about 30 elementary schoolchildren in Shenzhen, Guangdong Province, on New Year's Day.
Li Na (Photo by Li Jianyi) Li smiled nonstop during the lesson, which lasted more than an hour. "She has totally changed since she retired," a supporter whispered while watching the lesson.
