Serena Williams of the US celebrates after defeating Garbine Muguruza of Spain in their women's singles fourth round match at the Australian Open 2015 tennis tournament in Melbourne January 26, 2015. [Photo/Agencies]
Federer knocked out by Seppi in Australian Open
Nadal wins tough 5-set 2nd-round match at Australian Open
A tale of two Super Bowl-bound cities
Djokovic, Wawrinka advance to 2nd round at Australian Open
Li Na retires from tennis
17th Asian Games
US Open
Nanjing Youth Olympics