It doesn't matter what any other fans, analysts, experts or pundits will ever say. The greatest rivalry in the NFL will always be the Green Bay Packers and Chicago Bears.
And this season, another layer was added to the storied rivalry as former Packers cornerback Al Harris joined the Bears' coaching staff to coach their defensive backs.
Sure, he was previously with the Detroit Lions in the same role. But, it will always hit differently when it's Chicago.
One Bears rookie recently spoke about Harris' early impact on his game, too, and it just doesn't feel right.
Packers fans will feel some type of way about Al Harris coaching up a Bears rookie
"Coach has been helping me for sure ... being coached by him is really a blessing," said fifth-round pick Zah Frazier of Harris' early impressions.
"It definitely boosts my confidence. I got a coach that did it, too. So, he's just going to give me the game and I just got to add it to my toolbox and just be ready to work every day," he finished.
Having spent seven seasons with the Packers and earning two Pro Bowl bids, Harris was one who consistently gave the Bears fits.
He is most famously remembered for a moment that came in another game, though, and not against Chicago.
It was January 4, 2004 when the Packers took on the Seattle Seahawks in a playoff tilt. As the Seahawks won the overtime coin toss, quarterback Matt Hasselbeck told the ref, "We want the ball and we're gonna score."
The rest is history.
Hasselbeck would proceed to throw an interception into the hands of Harris on the Seahawks' second possession of the extra period.
Harris returned it for the game-winning touchdown.
And, as any loyal Bears fan would tell you, seeing the Packers win a playoff game hurt almost as much as watching them beat the Bears.
But now, Harris is on that Chicago sideline helping the Bears try and win games -- something that hasn't come easy in recent seasons.