Justin Jefferson won't return to the field for the Minnesota Vikings until he's 100%.

The Vikings opened his window for returning to practice this week as he rehabs an injured right hamstring.

"The hamstring is a difficult injury just because it lingers and it comes back from time to time if you don't put the right treatment into it," Jefferson said.

"The guys and the rest of the coaching staff in this building know my worth on the field and they want me at 100 percent, as I do as well. I don't want to go out there at 80 or 90 percent and have the chance of hurting it again. It's just day-to-day, and when that time comes, I'll definitely be ready to step out there."

The deadline for the Vikings to add him to their active roster is Nov. 29, which is during their bye week.