The Giants defensive captain didn't practice Thursday because of a sore neck, and he indicated he would not play in the season opener against the Redskins in Washington unless it improved.
Tuck, who was limited in practice on Wednesday, suffered a stinger in a preseason game against the New York Jets on Aug. 29. While the injury feels better, Tuck refused to guarantee that he would be available Sunday, noting that he was concerned, but not panicked.
The Giants have already lost cornerback Terrell Thomas and middle linebacker Jonathan Goff to season-ending knee injuries. Fellow two-time Pro Bowl defensive end Osi Umenyiora is rehabilitating his knee after arthroscopic surgery and will not play in the opener.