Novak Djokovic of Serbia gestures during his match against Ivo Karlovic of Croatia at the Madrid Masters Series tennis tournament in Madrid October 16, 2008. [Xinhua/Reuters]
![Novak Djokovic of Serbia gestures during his match against Ivo Karlovic of Croatia at the Madrid Masters Series tennis tournament in Madrid October 16, 2008. [Xinhua/Reuters]](http://images.china.cn/attachement/jpg/site1007/20081017/000802c98ccc0a625d8507.jpg "Novak Djokovic of Serbia gestures during his match against Ivo Karlovic of Croatia at the Madrid Masters Series tennis tournament in Madrid October 16, 2008. [Xinhua/Reuters]")