The Green Bay Packers have announced that Jordy Nelson may miss this weekend's game against the Detroit Lions.
The wide receiver left early in the game against the Minnesota Vikings after picking up a hamstring injury.
Packers coach Mike McCarthy told reporters: "I don't know how many weeks Jordy would be out. I think he would be pressed hard to play this week.
"Once we get past the initial couple days and see what he can do on the practice field, those questions will be answered.
"I feel probably a little bit better about T.J. [Lang, who sustained an ankle injury on Sunday] than I do about Jordy."
Nelson missed a game earlier this season against the Jacksonville Jaguars with the same injury.
The 27-year-old has scored six touchdowns this year.