Victoria Azarenka loses in Australian Open quarterfinal

The second-ranked player's 18-match winning streak comes to an end in a 6-1, 5-7, 6-0 upset to fifth-ranked Agnieszka Radwanska.MELBOURNE, Australia — Victoria Azarenka's 18-match winning streak at the Australian Open ended in an upset 6-1, 5-7, 6-0 quarterfinal loss to Agnieszka Radwanska on Wednesday to continue the flow of stars tumbling out of the season's first major.