The Chelsea Football Club has been plagued by several defensive issues over the past few seasons, leading to a number of disappointing results and defeats. In recent matches, Chelsea has conceded goals at an alarming rate, which is a clear indication that their defensive setup needs to be strengthened.

One of the biggest problems with Chelsea's defense is their tendency to concede goals when they should not. This can happen through various factors such as poor marking, lack of physicality from defenders, or even careless mistakes made by players on the pitch. The team needs to improve its defensive strategy and tactics to prevent these types of errors from occurring.

Another issue that Chelsea faces is the lack of quality defenders in their squad. While some players have shown promise throughout the season, there is still room for improvement. The club needs to invest in quality players who can provide strong defense and tackle opponents' attacks.

Furthermore, Chelsea's defensive formation is also contributing to their problems. They tend to rotate players in the middle of the field instead of using a more structured defense. This means that teams can exploit weaknesses in Chelsea's defense, making it harder for them to score goals.

To address these issues, Chelsea must focus on improving its defensive setup and tactics. The club needs to ensure that its defenders are well-trained and physically fit, so they can tackle opponents' attacks effectively. Additionally, the club needs to make sure that its midfielders are able to cover wide areas and create space for attacking players.

In conclusion, Chelsea's defensive problems need to be addressed urgently if the club wants to continue winning matches and reaching the top of the Premier League table. By investing in quality players, improving its defensive setup, and training its defenders, the club can create a stronger and more effective defensive structure.