Article Photos: Morning roundup: Serena Williams, Roger Federer reach Aussie semis

Serena Williams of the U.S., serves to Li Na of China during her Women's singles semifinal match at the Australian Open tennis tournament in Melbourne, Australia, Thursday, Jan. 28, 2010. (AP Photo/Paul Crock, Pool)

Serena Williams of the U.S., serves to Li Na of China during her Women's singles semifinal match at the Australian Open tennis tournament in Melbourne, Australia, Thursday, Jan. 28, 2010. (AP Photo/Paul Crock, Pool)