sentences:  The club suffered a devastating blow in the 1990–91 season when they missed an opportunity for promotion to the 2.Fußball-Bundesliga when they were sanctioned for the use of an ineligible player.The club was leading its division in a close race with Tennis Borussia Berlin when an arbitrator ruled that the transfer to Türkiyemspor of player Piotr Podkowik was illegal under league rules.