INDIAN WELLS, Calif. (AP) -- Sam Stosur has withdrawn from her quarterfinal match against Angelique Kerber at the BNP Paribas Open because of a right calf injury.
Kerber will move into the semifinals against either top-seeded Victoria Azarenka or No. 8 Caroline Wozniacki, who play later on Thursday.
Stosur says she hurt her calf muscle in the last game of a three-set win against Mona Barthel on Tuesday. The Australian didn't practice on Wednesday and iced her leg. Stosur was five minutes into her warm-up on Thursday when she realized she couldn't play.
She says this is only the second time she's pulled out of a match in her career and isn't sure how long she'll be sidelined.
Copyright 2013 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.
An 18-year-old creates a tiny device that charges a phone quickly. (Video)
Your future toothpaste could offer caffeine, pain relief and more.
'Star Trek' falls short of studio hopes; 'Iron Man 3' tops $1B worldwide.
Conn. zoo officials don't know how this baby came to be born.