Chelsea have conceded eight goals in just five matches this season, and the club is currently facing some serious defensive challenges. The team has been conceding goals at a rapid pace, which has led to concerns about their ability to defend against opponents.

One of Chelsea's biggest defensive issues is the loss of key players such as Cesar Azpilicueta and Andreas Christensen. These two defenders were key to Chelsea's defense last season, and their absence has left the team vulnerable to attacks from opponents.

Another issue that Chelsea faces is the lack of depth in their squad. With so many players out injured or suspended, the team is relying on younger players who may not be fully ready to take on the demands of the Premier League.

The team also needs to address the issue of their lack of discipline defensively. Injuries have led to a high number of yellow cards being issued, which has allowed opponents to create scoring opportunities.

In conclusion, Chelsea's defensive challenges are concerning and require urgent attention. The team needs to focus on strengthening their defense by signing new players and improving the performance of their current players. Additionally, they need to improve their discipline and work on their tactics to better deal with opposition attacks. Only then can they hope to turn their defense around and start winning games again.