The New England Patriots said in a statement Tuesday that tight end Rob Gronkowski sustained a bone bruise/sprain of his right knee.
Gronkowski will be evaluated on a week-to-week basis. The Patriots said there was no timetable for his readiness to return.
"I'm just week to week," Gronkowski said in an UNINTERRUPTED video posted on Bleacher Report. "I'll be working hard to get back on the field as soon as possible."
Gronkowski was carted off the field after hurting his right knee in the fourth quarter of Sunday's 30-24 overtime loss to the Denver Broncos.
The Patriots immediately announced that Gronkowski would not return to the game. ESPN footage showed Gronkowski walking with a slight limp from the X-ray room to the Patriots' locker room.
On Monday morning on WEEI, Patriots quarterback Tom Brady said he spent the morning digesting the loss to the Broncos as well as Gronkowski's injury.
"Tough game. This one hurts," Brady said. "I think the circumstances of the game, the circumstances of the situation that we were in -- having a good lead in the fourth quarter, then having a couple huge third downs that we made called back by penalty, then losing a player like Gronk in the fourth quarter, and then fighting back like we did to get it to overtime."
Gronkowski suffered the injury with 2 minutes, 49 seconds remaining in the fourth quarter, when Denver defensive back Darian Stewart hit him low on an incomplete pass. Gronkowski's leg whipped back as it made contact with Stewart.