In the ninth edition of the Telekom Cup, Borussia had as early as January of the same year again to be content with the fourth and last place after a defeat on penalties against Werder Bremen and against TSG 1899 Hoffenheim. The first round of the DFB Cup 2017–18 was able to make Borussia victorious. The VfL won the West duel against Rot-Weiss Essen 2–1. In the league prelude, the "Fohlenelf" kept by a goal of Nico Elvedi 1–0 in the Rheinland derby against 1. FC Köln the upper hand and "overwintered" after a final 3–1 home win against Hamburger SV to half-time as sixth with 28 points from eight wins, four draws and five defeats. In the DFB Cup Borussia were eliminated on 20 December 2017 in the last competitive game of the year after a 0–1 defeat in the second round against Bayer 04 Leverkusen in the Borussia-Park at home, after the "Werkself" had already on the 9th matchday of the Bundesliga at the same place won 5–1. The second round match failed; the decisive goal to 1–2 defeat at 1. FC Köln fell in the fifth minute of stoppage time. By contrast, the financial data in the 2017 financial year was more positive. Despite a lack of participation in international competitions, the association posted the second-best result in its history with a turnover of 179.3 million euros and a profit after tax of 6.56 million euros after the record year 2016. The 2017–18 season ended for Borussia after a 1–2 defeat at Hamburger SV left them in ninth place and thus missed, as in the previous year, the qualification for the European competitions. The game was also the last for Hamburg in the highest German league after 55 years of uninterrupted affiliation.