Detroit Lions wide receiver Calvin Johnson is questionable for this Sunday's game against the Jacksonville Jaguars, according to the team's website.
Johnson has not practiced this week because of a knee injury.
The wide receiver has been bothered with the knee for about three weeks, but this is the first week he missed practice.
"He's done it before," Lions coach Jim Schwartz. "He obviously knows our offense, and then his health is the most important thing."
The Lions (3-4) need Johnson as he is a major key to their success. He has 41 catches for 638 yards but just one touchdown.
"Any time your players aren't out there it's definitely a concern," Schwartz said. "An ideal situation is to go practice every day, but by the time you get to the middle of a NFL season, nothing's ideal."
Johnson said Thursday his goal is to be ready for Sunday.