The Denver Broncos got a season-opening win in a Super Bowl rematch on Thursday night, but the weekend might bring with it some bad news.

Wide receiver Demaryius Thomas, who finished the game with four catches for 48 yards, injured his hip during the game and had an MRI taken on Friday. The Broncos are sending that MRI out for a second opinion, per ESPN’s Adam Schefter.

Thomas at one point limped off the field with the injury, but returned to the game shortly thereafter. There’s obviously no way to know the extent of the injury just yet, but losing Thomas for any extended length of time would be a pretty crushing blow to the Denver offense. Thomas, Emmanuel Sanders, and C.J. Anderson are the biggest playmakers the Broncos have, and losing the threat of Thomas on the outside would certainly encourage defenses to stack the box against the inexperienced Trevor Siemian even more and roll all their coverage in Sanders’ direction.

Denver doesn’t exactly have a ton of depth at wide receiver, with Jordan Norwood and Cody Latimer being the next guys up on the depth chart if Thomas has to sit out. This is obviously a situation that will have to be monitored closely.

Source: CBS Sports / Report: Broncos seek second opinion on MRI of Demaryius Thomas’ hip