The Falcons needed a field goal in the final seconds of the game to seal a two-point win, having led 20-0 at half time.
The Falcons wide receiver told Yahoo! Sports: "I felt like in the first half we did a heck of a job, just coming out with attitude and executing at a high level.
"We got a little lazy in the second half. We kind of got too complacent, too relaxed. You can't do that in the playoffs. Every series matters. You can't have lulls, man.
"We've got to play a complete game. If we don't mind our P's and Q's, the whole team, we'll be in trouble."
The Falcons face the San Francisco 49ers in the NFC championship game on Sunday for a place in the Super Bowl.