MELBOURNE (Reuters) - The Australian Open was left without a defending champion in the semi-finals for the first time in the professional era when Victoria Azarenka followed Novak Djokovic out of the door on Wednesday.
Azarenka, champion for the last two years, tumbled out with a 6-1 5-7 6-0 loss to Agnieszka Radwanska less than 15 hours after Djokovic, who had been in the hunt for a fourth straight title, was upset by Stanislas Wawrinka in his quarter-final.
