Safety Nate Allen did not practice Friday because of a left hamstring injury he suffered the day before.
If he can't play Monday night against the Saints, David Sims will start in his place, Eagles coach Andy Reid said.
Allen said that he injured his hamstring during Thursday's practice. He injured his other hamstring in the fourth quarter of the overtime loss to the Lions on Oct. 14 and was replaced by Colt Anderson. Allen returned two weeks later, after the bye, and played the entire game against the Falcons.
Allen has three days to get ready for Monday night's game against the Saints. The Eagles practice again on Saturday, have a walk-through on Sunday and then fly to New Orleans immediately afterward.