Roger Federer of Switzerland celebrates for a score during the fourth round match of men's singles against Lleyton Hewitt of Australia in 2010 Australian Open Tennis Championship in Melbourne, Australia, Jan. 25, 2010. (Xinhua)
Roger Federer of Switzerland celebrates for a score during the fourth round match of men's singles against Lleyton Hewitt of Australia in 2010 Australian Open Tennis Championship in Melbourne, Australia, Jan. 25, 2010. (Xinhua)