Andy Murray reaches semifinal of Japan Open in Tokyo . Title holder takes three sets to beat Stanislas David . Novak Djokovic powers into last set at China Open in Beijing . Li Na puts out defending champion Agnieszka Radwanska .
Andy Murray reaches semifinal of Japan Open in Tokyo . Title holder needs three sets to beat Stanislas Wawrinka . Novak Djokovic powers into last four at China Open in Beijing . Li Na puts out defending champion Agnieszka Radwanska .