Reggie Bush has a partially torn left knee ligament that likely won’t require surgery but could sideline him for Monday night’s game at Atlanta.

Saints coach Sean Payton said Bush would be listed as questionable on the injury report and added whether Bush plays will be a game-time decision.

“We’ll monitor where he’s at,” Payton said after Friday’s practice, which Bush sat out. “I’m still hopeful for this weekend’s game.”

Bush practiced Thursday and did not indicate he was having any trouble when he spoke to reporters after practice. He became sore that evening, and the team ordered a MRI, which indicated a tear in his posterior cruciate ligament.

Bush was expected to seek a second opinion from Dr. James Andrews, an orthopedic surgeon based in Birmingham, Ala.

The injury is the latest setback for Bush, who took over as the Saints’ featured running back after Deuce McAllister’s season-ending knee injury in Week 3.

Bush has scored six touchdowns with 581 yards rushing and 417 yards receiving. His longest run so far has been 22 yards and his longest reception 25. He has 10 dropped passes and has fumbled eight times, though his team has recovered all but three of those.