Liam Rosenior began his Chelsea tenure with impressive results, winning eight of his first 11 games while working around a congested schedule. He initially praised the foundations left by predecessor Enzo Maresca and made only minor tactical adjustments, focusing on a more aggressive man-to-man press while navigating the club's hectic fixture list.

When Chelsea's schedule finally eased in February, Rosenior gained more time on the training pitch to implement his own ideas. The coach himself said: "Every coach would say the more time you get with the group, the more you can imprint what you want." Yet the more time he spent with players, the worse performances became, with Chelsea winning only three of their next 12 games.

The downward spiral culminated in five consecutive Premier League defeats without scoring, the club's worst run since 1912. Rosenior's aggressive tactics were exposed, particularly in an embarrassing 8-2 aggregate loss to PSG. His authority faded as players reportedly questioned his approach, and Chelsea ultimately plummeted to 10th in the table, leaving the new coach with his contract terminated.