The Chelsea defense has been struggling in recent weeks, with the team conceding three goals in their last two matches against Arsenal and Manchester United. The Blues have struggled to keep clean sheets this season, with only one victory coming from their last six games.

One of the main issues facing Chelsea is the lack of consistency at the back. The team has had several players out injured, which has made it difficult for them to maintain a strong defensive unit. Additionally, the team's midfield has also struggled to provide enough support for the defense, leading to some sloppy defending on occasion.

Another issue that has plagued Chelsea's defense is the fact that they have not played well together as a unit. The team has lacked cohesion and coordination, which has led to mistakes being made by the defenders.

To address these issues, the club will need to make significant changes to its defense. This could include bringing in new players who can provide more depth and experience to the squad, or even changing the formation altogether. It may also be necessary to look at the tactics used by the coaching staff to improve communication between the defense and midfield.

In conclusion, Chelsea's defense has been struggling recently, and it will need immediate attention if the team wants to compete for major honours this season. The club must focus on improving its defensive performance, and work towards building a cohesive unit that can perform consistently throughout the season.