The decision to start him as a substitute was tactical rather than punitive, reflecting Klopp's careful management of his young star's development.
The manager understood that Mateo's impact often came from his ability to change the game's rhythm when opponents were already committed to their defensive structure. Starting him on the bench also helped manage his physical load during a crucial period of the season.
The warm-up on the Schwarzwald-Stadion pitch provided Mateo's first direct experience of the atmosphere that would characterize the match. The Freiburg supporters were vocal and passionate, their chants creating an acoustic environment that would challenge Dortmund's communication and concentration throughout the ninety minutes.
