In a fascinating phenomenon, all four games set to be played in the Divisional Round of the NFL playoffs are rematches of regular-season games. That means quarterbacks Aaron Rodgers, Matt Ryan, Jay Cutler and Matt Hasselbeck have all seen the opposing defenses already. In the AFC, where each game is a divisional matchup, Tom Brady, Mark Sanchez, Ben Roethlisberger and Joe Flacco have already seen each other twice.
The added layer of complexity presented by having played a playoff opponent during the regular season campaign can work for or against either team. It all depends on coaching, preparation and the ability to make week-to-week adjustments. Read on for five keys to each of the weekend's four contests, and predictions of whom will win each.