Union Berlin's home stadium is the Stadion An der Alten Försterei, known for its passionate atmosphere and standing terraces.
Hoffenheim is owned by software entrepreneur Dietmar Hopp, who has invested heavily in the club's infrastructure and youth development.
Union Berlin achieved promotion to the Bundesliga for the first time in the club's history in the 2019/2020 season.
Hoffenheim has a strong youth academy, which has produced talented players such as Serge Gnabry and Roberto Firmino.
Union Berlin has a fierce rivalry with fellow Berlin club Hertha BSC, known as the Berlin Derby. Hoffenheim's main rival is Stuttgart, with whom they contest the Baden-Württemberg derby.