Dortmund's bracket system is one of the most successful and well-known in football history, with many teams achieving success under its guidance.
The system was introduced by German coach Jupp Heynckes in 2011 as a way to ensure that all players have equal playing time. It involves dividing the team into two halves and rotating players between them at regular intervals during matches.
Heynckes' vision for the system was that it would create a more balanced squad and reduce the risk of injuries, which could otherwise occur when certain players dominate the match.
Under Heynckes' leadership, Dortmund achieved great success, winning the Bundesliga title in 2013-14 and reaching the Champions League semi-finals in 2015-16. The team also won the DFB-Pokal (German Cup) in 2015, beating Bayern Munich in the final.
However, the system has not always been without controversy. Some critics argue that it can lead to a lack of creativity and innovation on the pitch, as players may be hesitant to take risks or make mistakes if they know they will likely be replaced later in the game.
Despite these criticisms, Dortmund continues to use the system successfully, and fans and analysts alike agree that it has played a significant role in the team's success over the years.