Switzerland's Roger Federer hits a forehand during a tennis practice session at Melbourne Park Jan. 13, 2009.[Xinhua/Reuters]
![Switzerland's Roger Federer hits a forehand during a tennis practice session at Melbourne Park Jan. 13, 2009.[Xinhua/Reuters]](http://images.china.cn/attachement/jpg/site1007/20090114/000bcdb95f1d0ad7899629.jpg "Switzerland's Roger Federer hits a forehand during a tennis practice session at Melbourne Park Jan. 13, 2009.[Xinhua/Reuters]")