GREEN BAY, Wis. -- It may take the entire week before Green Bay Packers linebacker Clay Matthews knows whether the groin injury he sustained in Sunday's loss to the Detroit Lions will prevent him from playing in this Sunday's game at the Chicago Bears.

Although coach Mike McCarthy said Monday that he had no medical updates, Matthews indicated that he's in a wait-and-see mode in part because he has never before had this injury.

"It's hard to answer that right now," Matthews said Monday. "Obviously I think it's something I can play with, but you've got to make sure you're operating at a high level. That will be the biggest obstacle, not obstacle but thing to find out, and I think we'll know more on Wednesday or Thursday."

Matthews was injured in the fourth quarter and finished the game on the sideline. At the time, it was unclear if Matthews was being held out simply because the game was out of reach or because he could not return.

"The way the communication goes on the sidelines is the medical staff determines if a player is up or down," McCarthy said.

That would indicate that Matthews could not have returned.

Matthews missed five games last season because of a twice-broken thumb and has dealt with hamstring pulls in the past.

"I feel good," Matthews said. "But it's new to me, so it's not like I can really compare it."

The only other injury that came out of Sunday's game was to cornerback Davon House. He originally left the game with cramps but then returned only to depart again because of a knee injury. House played one of his best career games, coming with up an interception and holding up well in coverage during part-time duty against Calvin Johnson.