1. FC Köln fell to a narrow 0-1 defeat against Union Berlin on Saturday, 20 December 2025, in a Bundesliga Matchday 15 fixture that kicked off at 14:30 UTC. The match, officiated by referee Christian Dingert, remained goalless at the half-time interval before Union Berlin found the decisive goal in the second half. The result at the RheinEnergieStadion handed the visitors three vital points heading into the winter break.

For Union Berlin, this victory was a significant boost in their campaign t...