Olympic champion Zheng battles into French Open last eight

The reigning Olympic champion extended her winning streak at Roland Garros to 10 matches, winning 7-6 (7/5), 1-6, 6-3 on Court Suzanne Lenglen. Zheng said that she does not feel like a defending champion despite winning Olympic gold at the same venue last summer. "It's different because Grand Slam we need to play seven matches, and the Olympic Games is six matches to get a gold medal," she said. "I really don't consider myself as defending champion. Right now even though I'm in (the) quarter-final...