After reviewing the game tapes and metrics for the Bears and Saints, I believe there are two keys to this game.
1. Can the Saints force Rex Grossman into making bad decisions?
The likeliest way to beat Chicago this season was to hope Grossman would lose the game. He had five games with three or more interceptions, and Chicago was 2-3 in those games, with one of the wins being the miracle comeback against Arizona.
What are the Saints' chances of forcing Grossman into one of these games? I did a metric analysis of Grossman's season and found that he has been doing a much better job of managing his risks of late.