The 1998–99 season was the eighth time Tennis Borussia Berlin played in the 2.
Fußball-Bundesliga, the second highest tier of the German football league system.
After 34 league games, Tennis Borussia finished 6th.
The club had a long run in the DFB-Pokal; making it to the quarter-finals where they lost 2–1 after extra time away to SV Werder Bremen.
Ilija Aračić scored eight of the club's 47 league goals before his mid-season move to local rivals Hertha BSC.