Here are three things to watch for:
1. Timing: It was obvious that quarterback Cam Newton needs more time working with his new receivers after he made his preseason debut in Sunday night's 28-16 victory over Kansas City. He started 1-for-5, missing rookie wide receiver Kelvin Benjamin wide open down the left sideline at one point. The Panthers have increased Newton's reps in practice, but as coach Ron Rivera acknowledged, you can't simulate game speed. Newton will play the first half. It will be his last significant tune-up for the regular season with starters expected to play sparingly -- if at all -- in the final preseason game. He has shown chemistry with Benjamin and his other receivers in practice, but now needs to do that in a game. The Patriots should be a good test. They had two forced fumbles and two interceptions that they turned into 21 points in last week's 42-35 exhibition win over Philadelphia.
2. Time to step up: The Panthers signed free agent wide receiver Tiquan Underwood to a two-year deal after losing their top four receivers from 2013. You don't do that unless you expect him to make the roster. As of now he's on the outside looking in. The top three are Benjamin, Jerricho Cotchery and Jason Avant. If the season started today, because of his return duties, undrafted rookie Philly Brown would be the fourth. Brenton Bersin would be the fifth in the team activated five. Odds are Carolina won't keep more than six receivers on their 53-man roster. Rivera continues to harp that he wants to see one or two outside the top three step up. Underwood is one of those because of his elite speed, something the top three don't have and another reason Brown's stock has risen. That the opponent is New England is a bit ironic because the Patriots released him the night before their Super Bowl loss to the Giants during the 2011 season. Rivera is going to give the young receivers more opportunities. If Underwood doesn't step up, he could be in danger of being cut for the ninth time in his career.
3. Time to start fast: The Carolina defense has started slowly in each of the first two preseason games, giving up big chunks of yardage early. The Panthers were outgained 114-1 at one point during the first quarter, but to their credit gave up only a pair of field goals. Many of those yards were surrendered due to mistakes or communication breakdowns in the secondary. Some of that has to do with a new group of defensive backs learning each other. Melvin White and Antoine Cason appear to have nailed down the starting corner jobs, and Charles Godfrey appears set as the nickelback in his transition from safety. But starting strong safety Roman Harper (turf toe) has yet to play in a preseason game and won't again tonight, leaving unheralded Anderson Russell and Robert Lester fighting for the backup job. Free safety Thomas DeCoud is in his first season with Carolina, so he's still adjusting to the system. Facing Future Hall of Fame quarterback Tom Brady should give this group a good idea of where they are.