On Sunday afternoon, the San Francisco 49ers and Seattle Seahawks will meet in the latest chapter of what is quickly becoming one of the most heated rivalries in the NFL.
With two teams who genuinely dislike one another getting together with a trip to the Super Bowl on the line, you can bet that this will be a hotly contested, back-and-forth affair.
Throw in two of the NFL's top young quarterbacks and a pair of the NFL's most dominant defenses, and the 2013 NFC Championship Game has the makings of an old-school slugfest.
These teams are very familiar with another, and given that they meet twice a season there are some things we can point to from past matchups as keys to this week's showdown.
Keys such as these.