The wide receiver told reporters: "I'm watching their entire secondary. I think, all-around, they obviously have the best defense in the NFL. And they get after the opponents. Up front, very aggressive, in the back end, they make plays.
"I think every game presents different challenges, whether it is certain coverages, New England, a lot of man coverage was a challenge for us. This, again, is going to be a huge challenge.
"We faced these guys in the pre-season and they're tough. And we know we've got our work cut out for us. But again, we're excited for that challenge and just to have the opportunity to be playing in the Super Bowl."
Decker finished the regular season with 1,288 receiving yards and 11 touchdowns.