At the start of the season, Koopmeiners was one of the most exciting prospects in Serie A. He had been signed by Juventus from Ajax for a fee believed to be over €50 million and was expected to become the new heart and soul of the midfield. However, things didn't go as planned.

In his first few months at Juventus, Koopmeiners struggled to find his feet. He made several errors on the pitch, which cost Juventus points. His performance was criticized by many fans and media alike, who were not satisfied with his lack of consistency.

Despite this, Juventus continued to rely heavily on him, hoping that he would improve over time. But it didn't work out that way. Koopmeiners' performances remained inconsistent throughout the season, and he struggled to make an impact in the midfield.

Injuries also played a part in Koopmeiners' struggles. Injuries forced him to miss several games, which further hindered his progress. As a result, he ended up being substituted in more than half of the matches he played during the season.

Overall, Koopmeiners' mid-field rating at Juventus was disappointing. Despite being highly rated before joining the club, he failed to deliver what was expected of him. His inconsistency and injuries only added to his struggles. It remains to be seen whether he can turn things around and regain his place in the team or if he will have to look elsewhere for a fresh start.