The injury forced the 39-year-old Sakic to miss seven games after he hurt himself during a weightlifting session.
Results from an MRI were negative, but the newspaper reported that he will undergo more testing in the coming days.
Sakic did not play in Colorado's 4-3 victory over Tampa Bay on Saturday, one day after he was able to play just one 28-second shift against the Phoenix Coyotes.
"You're always worried," Coach Tony Granato said. "Anytime you lose a player like Joe, your captain and your leader, you always have a concern."
Since the injury, Sakic has played only one full game -- Wednesday against St. Louis.
This season, he has two goals and 10 assists in 15 games, and is tied for fourth on the team in scoring with 12 points.
Celebrity Families of 2014 [PHOTOS]