In the midst of the intense competition in Serie A, Milan has been working tirelessly to optimize their tactical approach for the upcoming rounds. After analyzing their performances and identifying areas for improvement, here is a comprehensive analysis of Milan's tactical direction following round 4.

Firstly, it's clear that Milan's defense remains a major concern. The team conceded three goals against Atalanta in their last match, which was a significant setback considering their defensive record this season. To address this issue, the club may consider making changes to their defense, perhaps by signing a new center-back or bringing in a more experienced player to partner with their current defenders.

Secondly, Milan's midfield needs to be strengthened as well. With the loss of Ciro Immobile, they have struggled to create any meaningful attacking opportunities. To counter this, the club could look to bring in a dynamic midfielder who can provide the creativity and vision needed to unlock opponents' defenses.

Thirdly, Milan must focus on improving their attack if they hope to remain competitive. While their goal-scoring capabilities are not the best in Serie A, they have the talent to score when given the chance. By increasing their intensity and work-rate, Milan could increase their chances of scoring and potentially even getting a few more goals than their opponents.

Lastly, Milan's tactics need to adapt to their opponents' strengths. In their previous matches, they have faced teams like Atalanta and Lazio who play with high-pressing styles. To counter these tactics, Milan may need to adopt a more expansive playing style, allowing their full-backs to push up and creating space for their attackers to run into.

In conclusion, Milan's tactical optimization strategy following round 4 will depend on addressing their weaknesses and finding ways to improve their overall performance. Whether it's through strengthening their defense, improving their midfield, or enhancing their attack, the club must stay focused and make adjustments to ensure they continue to compete at the top level of Italian football.