The Milan fans' confidence in their team's round 4 match was high, as evidenced by the positive attitude and excitement displayed on social media platforms. The team had shown great resilience and determination throughout the season, and they were confident that they could continue to perform at a high level in the upcoming round.

One key factor contributing to Milan's confidence was the strong support from their loyal fan base. They received a significant amount of pre-match tickets and merchandise sales, which helped to boost their morale and confidence levels. Additionally, the team's performance in the previous rounds had given them a good sense of familiarity with the stadium and crowd, which helped to increase their confidence even further.

Expectations were also a major factor contributing to Milan's confidence. The expectations were set high for both themselves and their opponents, as they knew that there would be many challenges ahead. This expectation was reflected in the team's performance during the round 4 matches, where they consistently performed well against teams who had similar expectations.

However, it is important to note that Milan fans' confidence can also be influenced by personal biases and emotions. For example, some fans may have a bias towards certain players or coaches, which can affect their confidence levels. Similarly, some fans may have emotional ties to the club, which can influence their expectations and confidence levels.

In conclusion, Milan's confidence in their team's round 4 match was largely due to the strong support from their fan base, the performance of the team during the previous rounds, and the expectations placed on them. However, it is essential to remember that individual experiences and emotions play a significant role in determining a team's confidence.