A quick breakdown of the conference championship games.
AFC Championship game: New England at Indianapolis
The Colts will win if
1. Quarterback Peyton Manning keeps throwing the ball between the hashes and up the seams to tight end Dallas Clark, and continues to check down to tailback Joseph Addai. There is no doubt that the studs in the Indianapolis passing attack are wide receivers Marvin Harrison and Reggie Wayne. But Clark provides the Colts a different dimension and, when he is flexed into the slot, is a difficult matchup for any defense. Because the cornerbacks need help from the safeties to cover the wide receivers, Clark becomes almost impossible to bracket sometimes. In his last three games since returning from a knee injury, Clark has 15 catches for 200 yards. And Addai, with 10 receptions in the playoffs, helps move the chains.
3. Kicker Adam Vinatieri, who provided all the scoring in Saturday's divisional-round upset victory at Baltimore, is on the field, lined up over a potential game-winning field goal in the waning seconds of the AFC Championship game. Some irony, huh, if that's the case? The guy who put two Super Bowl rings on the fingers of Patriots' players with winning field goals in a pair of title games and was part of a third Super Bowl win as well, beating the Patriots. The Colts signed the game's greatest clutch kicker for such an occasion. Vinatieri has nailed all eight field goal attempts in two playoff games this season. He is now 34-for-42, an .810 conversion rate, on field goal tries in the playoffs. The Colts will feel more comfortable with him on the field than they did when Mike Vanderjagt was lined up for the potential game-tying kick in last year's divisional-round loss to Pittsburgh.
The Patriots will win if
1. Strong safety Rodney Harrison miraculously returns from the sprained medial collateral ligament that has sidelined him the past two weeks and owner Bob Kraft successfully petitions the league to allow him to borrow Kansas City cornerback Ty Law for the game. Both secondary stalwarts are the longtime nemeses, of course, of Peyton Manning. Seriously, the New England secondary is going to need a big game from everyone, including suspect safeties Artrell Hawkins and James Sanders. Cornerback Asante Samuel has played lights-out of late, but he can only handle one of the wide receivers. The Pats have to keep the action in front of them, tackle well and not surrender any game-altering big plays.
2. Offensive tackles Matt Light and Nick Kaczur, neither of whom has enjoyed a sterling season, repeat their solid performances of Sunday evening. The two were magicians, making the San Diego pass-rush tandem of Shawne Merriman and Shaun Phillips disappear at times. They'll have to play just as well against Freeney and Mathis. If the Pats give Tom Brady clean passing lanes, and the snippet of time he needs to unload while working off quick drops, he's apt to find some room in the Indianapolis secondary. Brady loves to spread the ball around, and typically throws to eight or 10 different receivers in a game, and he'll try to distribute the ball evenly against a Colts' defense he knows well.
3. The up-front defenders in the New England 3-4 scheme manhandle the Colts' interior blockers in the running game. The Patriots' trio of Richard Seymour, Vince Wilfork and Ty Warren is really on a roll and is steamrolling opponents right now. All three are capable of simply rag-dolling a blocker, stepping up into the hole and stymieing a play. How good is the unit, which features three former first-rounders? Consider this: Seymour is the lone representative from the New England defense voted to the Pro Bowl game and, while he registered another strong year, he might not have even been the best defensive lineman on the roster. If this group gets cranked up, it could make it a long day for the Indy line.
NFC Championship game: New Orleans at Chicago
The Bears will win if ...
1. They can knock the high-octane New Orleans offense, ranked first in the league during the regular season, off the field on third down. New Orleans was third in the NFL in third-down conversion rate, 44.9 percent, during the season and quarterback Drew Brees has a knack for being able to keep third-down plays alive. The Chicago defense permitted a minuscule third-down conversion rate of 31 percent, but it faltered late in the season, surrendering 39.1 percent in the last month of the year and in Sunday's divisional-round win over Seattle. Because it wasn't able to get off the field, the Bears' defense wore down and allowed an average of 25.8 points in its past five outings.
3. The Chicago interior offensive linemen can figure some way to uproot mammoth defensive tackle Hollis Thomas, one of the NFL's best run-stuffers, and then control tempo with the inside run. Thomas was suspended the last four games of the regular season for violating the steroid policy. But he returned for the Saturday playoff contest and was immediately a factor, clogging things up inside, and contributing three tackles. When he gets himself anchored, Thomas is virtually immovable. The Bears have to get some push against him to be able to operate their offense. The other tackle, Brian Young, is very active, but he can be run out of some plays by using his pursuit skills against him.
The Saints will win if ...
1. Their offense stays as balanced as it has been most of the season and head coach Sean Payton, who calls nearly all the plays, remains fearless in dialing up creative calls. Against a typed defense like that of the Bears, it's often beneficial for an offense to go out of character and the Saints like to do that, passing on early downs and running on third down. The New Orleans offensive mix keeps a defense guessing. It also allows the Saints to dictate the tempo and keep their high energy offense moving. Tailback Deuce McAllister remains the centerpiece, but the real beauty of the New Orleans attack is that Payton will throw the ball anywhere on the field. The Saints have nine players with 15 or more receptions.
2. Defensive ends Will Smith and Charles Grant have strong performances, not just in terms of applying pressure on Bears quarterback Rex Grossman, but also in pinching against the run. The New Orleans ends represent one of the best two-way tandems in the game. Grant and Smith are very active and figure to own an advantage in quickness over Chicago tackles John Tait (left) and Fred Miller (right). They combined for 16½ sacks in 2006. Tait has slipped some this season, particularly when facing elite speed rushers, and will have his hands full with Smith, a rising star who plays bigger than his size. Grant is a nasty player and when his motor is revving high, he's hard to control.
3. Brees attacks the middle of the field. The season-ending foot injury suffered by standout safety Mike Brown left the Bears without a viable, playmaking presence between the hashes. That could be critical against the New Orleans passing game. The Saints averaged 12.4 yards per completion in 2006, about the NFL average, but had four players with 30-plus receptions and averages of 14.8 yards or more. New Orleans will throw the ball outside the numbers, especially with quick hitches to Marques Colston, but they make most of their big plays in the passing game between the hashes. Colston and Devery Henderson are very good running post patterns and inside slants, where they can use their size and speed.
Len Pasquarelli is a senior writer for ESPN.com.