We'll look at one matchup on both sides of the ball:
Cowboys NT Jay Ratliff vs. Packers LG Daryn Colledge
The relentless Ratliff is one of the NFL's premier interior pass rushers. Colledge ranks second in the league in sacks allowed (7.25), according to Stats, Inc.
Of course, the Packers will try to avoid letting Ratliff work one-on-one against Colledge. But look for Wade Phillips to create some of those opportunities for Ratliff in the nickel package, when he lines up over the guard in a four-man front. It helps that the Packers won't want to leave LT Chad Clifton alone against DeMarcus Ware.
Ratliff had two sacks in last week's win over the Philadelphia Eagles. It wouldn't be surprising if he matches that total Sunday in Green Bay. Nickel DT Stephen Bowen is also capable of exposing Colledge's problems in pass protection.
Cowboys WRs vs. Packers CB Jarrett Bush
If Miles Austin gets matched up against Bush, that's a major mismatch. It might look like a replay of his big-play performance against the Packers last season, when he had two catches for 115 yards and a touchdown. There's no reason Roy Williams shouldn't be able to beat Bush, too, especially if Green Bay rolls coverage toward Austin.