All you have to do is look back at the 2007 Fiesta Bowl and understand why Alabama officials are crossing their t’s and dotting their i’s — and then some — to prepare for Washington.

Nick Saban’s crew is reportedly charting every trick play a Chris Petersen-led team has run for the better part of the last decade, and for good reason.

Petersen has a proven track record of knowing how to fool a defense.

Petersen went 92-12 in eight seasons with Boise State, finishing with 12 wins or more five different times while earning a 2-0 record in BCS bowl games.

It hasn’t taken him very long to get Washington on the same track, taking the Huskies to their first 12-win season since 1991 — the last time the program won a national championship.

Alabama hasn’t lost a game in 15 months and enters the College Football Playoff semifinal matchup as a massive, 15-point favorite.

But it’s still best to be prepared for the unexpected.