Olympic champion Tirunesh Dibaba of Ethiopia has pulled out of Wednesday's 5,000-meter qualifying at the world championships because of injury.

Dibaba was forced to pull out of the 10,000, where she was the defending champion, early in the championships.

Her no-show leaves compatriot Meseret Defar as the favorite.

The Dibaba family was still represented by Tirunesh's 18-year-old sister, Genzebe.