FLOWERY BRANCH, Ga. (AP) The Atlanta Falcons are facing a sudden void atop their depth chart at running back after Devonta Freeman strained his hamstring in Thursday's practice.

Freeman spent the remainder of practice with trainers on the practice field. He wasn't taken inside, an indicator the injury is not believed to be serious.

Rookie Tevin Coleman strained his hamstring on Wednesday and did not practice on Thursday.

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Freeman opened training camp as the favorite to start.

The injuries created an unexpected opportunity for veteran Antone Smith and undrafted rookie Terron Ward, who saw time with the starters late in practice.

Offensive coordinator Kyle Shanahan says he hopes the injuries are not serious. The Falcons play their preseason opener against Tennessee on Aug. 14.

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AP NFL website: www.pro32.ap.org and www.twitter.com/AP-NFL