Defending champ has no answer for feisty Radwanska

Defending champion Victoria Azarenka said she lacked focus after blowing a golden opportunity to win her third straight Australian Open when she was knocked out in the quarter-finals on Wednesday.

The second seed, who won the past two tournaments at Melbourne Park, made 47 unforced errors as her game was taken apart by aggressive fifth seed Agnieszka Radwanska in another big tournament upset.