According to Ian Rapoport of NFL Network, Bakhtiari is believed to have suffered a torn ACL at Friday's practice.
Bakhtiari likely is undergoing a battery of tests to figure out extent of the damage in his knee, but in any case his loss is a tough one for the Packers offense. When Bakhtiari sat out Weeks 7 through 9 earlier this season due to a chest issue, Billy Turner slotted in at left tackle for Green Bay.