Hamburger SV's recent matches have revealed vulnerabilities in their defense. Unnecessary mistakes and misunderstandings within the backline have allowed opponents to create dangerous situations. Therefore, it's time to reconsider the tactical approach and make some adjustments to ensure defensive stability.

A central point could be the switch to a three-man defense. This formation could provide the center-backs with more support and involve the wing-backs additionally in defense. Incorporating two defensive midfielders could also help make the transitions between attack and defense smoother, creating extra security.

Moreover, increasing the pressing intensity in midfield could contribute to limiting the opponent's time and space to build dangerous attacks. This would not only strengthen the defense but also allow HSV to become more dangerous in possession by increasing pressure on their adversaries.

Another aspect to consider is communication within the defense. Regular training sessions and team meetings could help improve automatisms and minimize misunderstandings. Players need to become more familiar with their teammates' movements and positions to react better to each other during matches.

Lastly, the individual performances of players should be analyzed. The form of certain defenders could impact the overall stability of the defense. If specific players are not performing at their best, it might be wise to consider alternatives to strengthen the backline and create more competition within the squad.