Dan Campbell wasn't surprised by the Detroit Lions' 21-20 Opening Night win over the Kansas City Chiefs.

Campbell prepared his team for Thursday's upset at Arrowhead Stadium, as Detroit opened the regular season 1-0 for the first time since 2017.

"I didn't learn anything, I got verification on what I already knew, and this is a resilient team," Campbell said. "It already was a resilient team and we added pieces to that resilient team, so we're built to handle some stuff and we did that today against a very good opponent."

The Lions trailed 17-14 entering the fourth quarter against the defending Super Bowl champions.

"We expected to win this game. We came in here and we knew what we needed to do, and we knew it wasn't going to be easy and we did that," Campbell said. "Really what it means is that's one [win]. That's one. So, we've got to clean up our issues. It hurt us on some stuff today and be ready for Seattle in 10 days. That's what it is."