As Schefter states, Denver will conduct tests on Sanders to confirm the severity of the injury.
Broncos head coach Vance Joseph is scheduled to speak with Bay Area media via a conference call at 12:15 p.m. PT. If that conversation still takes place, Sanders will likely be a topic of discussion.
Sanders is the Broncos' leading receiver. He has 71 catches for 868 yards with four touchdowns through 12 games this season.