On Sunday, the Green Bay Packers lost for the first time in 364 days, and despite their league-best 13-1 record, there are certainly some concerns.
On offense, the Packers showed significant vulnerabilities, from the injuries to the offensive line to the increasing problem with dropped passes amongst receivers.
The defense was able to hold the Kansas City Chiefs to four field goals, but still let them run up and down the field and take time off the clock.
While this game could prove to be an aberration for a very good football team, it could be an exposure for some major concerns that have been covered for the past 13 weeks due to the fact that the Packers were still winning.
Here are the top five biggest concerns after a very difficult Packers loss against Kansas City.