FOXBOROUGH — It’s not just Tom Brady vs. Peyton Manning today. There’s a slew of things to watch for as the Patriots host the Denver Broncos.

1) The secondary — Steve Gregory is out of today’s game with a hip injury and will likely be replaced by safety Tavon Wilson. This also affects the team’s sub packages, where Wilson played alongside Gregory as the team increased from four to five and six defensive backs. Anyone from Ras-I Dowling to Marquice Cole will likely also contribute, but it will be key to see who handles the responsibility of coverage and who handles the responsibility of run support in those packages.