Sergei Gonchar's season could be over.

The veteran blueliner, who left Saturday's 3-2 comeback victory over the Tampa Bay Lightning after getting run into the glass by Mattias Ritola, is out with a concussion and there is no timetable for his return.

Senators GM Bryan Murray told the Ottawa Sun that under the NHL's new concussion protocol, Gonchar must miss at least a week before he can have a baseline test to see if he can return.

With two weeks left on the schedule and league emphasis on making sure players don't return from concussions until they're fully recovered, it's quite possible we won't see Gonchar again this season.

"I don't know how bad it is," said Murray. "You never know with these types of injuries. Hopefully, he's not going to be out that long."

While the hit looked innocent, Murray and coach Cory Clouston said the injury occurred from the impact of Gonchar's head hitting the glass. He got to the bench and didn't feel right.

"It wasn't that hard of a hit," said Clouston. "I guess he just went in sideways and hit his head against the glass. We didn't even realize it had happened because it wasn't that much of a hit.