In the world of football, there is no such thing as a perfect team. Every team has its strengths and weaknesses, and Lille, one of France's top clubs, is no exception.

One area where Lille can improve is their defense. In recent years, the team has struggled to keep clean sheets, and this has cost them matches in important competitions. However, manager Christophe Galtier believes that switching from a 5-4-1 formation to a 5-2-1 can help the team improve their defensive performance.

The 5-4-1 formation was originally used by former manager Rudi Garcia, but it proved to be unsuccessful in keeping the team defensively sound. The team often had too many players on the pitch at once, which made it difficult to cover all areas of the pitch. This led to more mistakes being made and fewer clear chances being created.

By switching to a 5-2-1 formation, Lille can reduce the number of players on the pitch while still maintaining a solid defense. This allows the team to cover more ground and create more space between the lines, making it easier for defenders to get into position and prevent opposition attackers from getting past them.

Galtier also believes that switching to the new formation will give his team more freedom on the pitch. By having just two central midfielders, he can allow them to push higher up the pitch and take more risks when attacking. This can lead to more goals being scored and a more balanced team performance.

Overall, switching to the 5-2-1 formation seems like a promising move for Lille. While it may take some time to adapt to the new system, Galtier and his team should be able to improve their defensive performance and increase their chances of success in important matches.