The San Francisco 49ers visit the NFC South-champion New Orleans Saints on Sunday. Kickoff is set for 1 p.m. ET. New Orleans is a two-point favorite, while the Over-Under for total points scored is 45.

Before you make any Saints vs. 49ers picks of your own, you NEED to hear what NFL expert Tom Fornelli has to say.

A CBS Sports writer since 2010, the entertaining Fornelli is a consistent winner when it comes to against the spread and over-under picks. And no one knows the 49ers like Fornelli. In fact, he has hit nine straight against-the-spread picks involving San Francisco! Anyone who has followed him is WAY up.

We can tell you Fornelli is leaning Under on Sunday, but his much stronger play is on the spread. Fornelli has found a crucial x-factor that has him going BIG on one side. You ABSOLUTELY need to see it before locking in your own picks.

Who wins Saints vs. 49ers on Sunday? And what crucial x-factor makes one side of the spread a MUST-BACK? ... Join SportsLine right now to see which side of the Saints vs. 49ers spread you need to back on Sunday, all from the acclaimed expert who's an amazing 9-0 on 49ers picks!