The Patriots supposedly faced their toughest test of the season thus far on Monday night against the Houston Texans. They passed with flying colors. Unfortunately, things will get even tougher this week, when the Pats host the 49ers in a crucial Sunday night showdown.

NFL Network analyst Mike Lombardi dropped by WEEI’s Dennis and Callahan on Friday to discuss the upcoming tilt, which many might point to as a Super Bowl preview. Lombardi doesn’t expect Sunday’s game to go the same way that Monday’s game against the Texans did, mainly because of San Francisco’s defense.

Lombardi thinks this will be the toughest challenge of the regular season for the Patriots, as the 49ers are currently playing defense at a championship level. Check out Lombardi’s analysis in the video above.