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Just like the impact of "X-Factor" players for both teams, favorable match-ups (or unfavorable ones, depending on your perspective) could be a deciding factor for either team.
With teams like these, you could sit here and analyze pretty much any match-up in the game and call it "important," but one for each team stands out to me.
Julius Peppers vs. Chad Clifton
Julius Peppers is probably the most terrifying defensive player in the NFL. No matter what tackle he is lining-up across from, it's a mismatch.
Green Bay's left tackle Chad Clifton does an adequate job protecting Aaron Rodgers' blind side (most of the time), but this match-up could be a landslide in Peppers' favor as the LT nurses a knee injury that could end up being a huge factor in the game.
According to the Packers' website, Clifton was limited in practice on Wednesday and was a full participant on Thursday. Though he is a "go" for the game, this knee injury could end up slowing him down against a speedy and powerful defender.
If this injury nags Clifton at all, Rodgers could end up on his face a lot, and that makes it difficult to put the ball in the end zone.
In the 2010 NFC Championship game, Peppers was limited to a mere two tackles and no sacks against this Packers offensive line. Peppers switched back and forth from the right and left end positions to try to exploit mismatches, but in the end, he wasn't much of a factor in the game.
This cannot be the case for this game if the Bears have any hope of slowing down Rodgers.
By leaving Peppers to tire out Clifton, he may be able to get into the backfield and blow up some plays. Whatever perspective you are looking from, this match-up will be very important to watch.
Charles Woodson and Tramon Williams vs Roy Williams, Johnny Knox, and Devin Hester
As I touched on earlier, Tramon Williams will have a huge impact on this game. He and Charles Woodson make up arguably the best cornerback tandem in the NFC.
The Bears receivers, on the other hand, aren't fantastic. You know your passing game is in trouble when your team's leading receiver is your RB, and that's with 15 receptions.
Roy Williams might not be available for the game, and even if he is, he probably won't be very effective against a defensive secondary with this level of talent.
With QB Jay Cutler unsure of his offensive line, it will be up to this group of unproven receivers to get open on short and intermediate routes so that the Bears can get some sort of offensive momentum.
If the Bears' offense becomes one-dimensional, this game will be over in a hurry. Williams and Woodson don't necessarily have their work cut out for them, from my perspective, but they will have to limit the production of these receivers so that their pass-rush can put Jay Cutler on the sidelines.
Like I said above, whatever perspective you're looking from, this match-up could decide the game.