Result: Angelique Kerber gets Samantha Stosur walkover

Angelique Kerber of Germany hits a return shot in her match with Lucie Hradecka in the second round of the Australian Open tennis championship on January 16, 2013
© AP Photos
Angelique Kerber gets a walkover into the semi-finals of the BNP Paribas Open after Samantha Stosur is forced to pull out of their match through injury.

Angelique Kerber has reached the semi-finals of the BNP Paribas Open after Samantha Stosur was forced to pull out of their match through injury.

Former US Open champion Stosur has withdrawn from the tournament with a calf problem.

Fourth seed Kerber will face either Victoria Azarenka or Caroline Wozniacki in the last four.

Kerber's previous best at Indian Wells was a semi-final appearance last year.

Victoria Azarenka reacts during her semifinal match against American Sloane Stephens at the Australian Open tennis championship on January 24, 2013
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