As teams head towards the NFL's postseason, they must take a look in the mirror and assess their own weaknesses.
Who has struggled all season and who could be a concern as the playoffs draw near?
Knowing everything about prospective opponents is a must, but so is realizing where your own flaws and potential weaknesses may lie.
So, who is the player on each playoff contender's roster that they are most concerned about?
Let's start in the nation's capital...