Azarenka latest Melbourne casualty

Two-time champion Victoria Azarenka has withdrawn from the Australian Open, with her wildcard entry to the season's first major reallocated to Ajla Tomljanovic.

Australian Open organizers announced Azarenka's withdrawal in a social-media post on Monday, a week before the tournament begins.

"It's unfortunate that (Azarenka) is unable to travel to Australia this year," organizers posted on Twitter, quoting tournament director Craig Tiley.