Milan's tactical optimization in the fourth round has been a key focus for the club this season, with the team looking to secure their place in Europe next year. The challenges that Milan faces in the fourth round include securing victories over teams like Roma and Inter Milan, as well as managing the injuries that have affected the squad.

One of the main strategies that Milan is using to optimize its tactics is to focus on playing possession-based football, rather than relying solely on counter-attacks. This approach allows Milan to control the tempo of the game and create opportunities for its attacking players to score goals. Additionally, Milan is also utilizing a more aggressive pressing system, which helps to disrupt the opposition's rhythm and make it difficult for them to maintain possession.

However, there are still some challenges that Milan needs to overcome in order to be successful in the fourth round. One of the biggest obstacles is the need to balance the demands of playing two home games in one week, which can be physically and mentally demanding for the players. Additionally, Milan will need to manage the workload of its injured players, who could impact the team's ability to perform at its best.

Despite these challenges, Milan's tactical optimization strategy seems to be working so far, with the team winning both of its home matches against Sassuolo and Bologna. However, the road ahead is not easy, and Milan will need to continue to work hard if it wants to secure its place in Europe next year.