Zhang Ning of China celebrates after winning her women's singles final badminton match against her compatriot Xie Xingfang at the Beijing 2008 Olympic Games, August 16, 2008.  [Xinhua]

Beijing - Defending champion Zhang Ning, at the age of 33, won the gold medal of badminton women's singles here on Saturday at the Beijing Olympic Games.

Zhang won the title by beating the world No. 1 and her teammate Xie Xingfang 21-12, 10-21, 21-18.