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Novak Djokovic of Serbia returns the ball to Mikhail Youzhny of Russia during a match in men's singles third round of the Beijing 2008 Olympic Games tennis event in Beijing, China, Aug. 13, 2008. [Xing Guangli/Xinhua]
![Novak Djokovic of Serbia returns the ball to Mikhail Youzhny of Russia during a match in men's singles third round of the Beijing 2008 Olympic Games tennis event in Beijing, China, Aug. 13, 2008. [Xing Guangli/Xinhua]](http://images.china.cn/attachement/jpg/site1007/20080814/000802c98ccc0a0dc6340a.jpg "Novak Djokovic of Serbia returns the ball to Mikhail Youzhny of Russia during a match in men's singles third round of the Beijing 2008 Olympic Games tennis event in Beijing, China, Aug. 13, 2008. [Xing Guangli/Xinhua]")