1. FC Union Berlin pulled off a major upset, defeating league leaders Bayer 04 Leverkusen 1-0 at the Stadion An der Alten Försterei on February 21, 2026. This shock Bundesliga result was a testament to Union's defensive organization and fighting spirit, halting Leverkusen's impressive run. The only goal of the game came in the 65th minute from a Union Berlin set-piece, which was powerfully headed home. Leverkusen dominated possession but found it difficult to break down Union's resolute low block, with the home goalkeeper making several crucial saves. The key incident was a potential penalty appeal for Leverkusen that was waved away by the referee, a decision that was hotly debated after the match. This victory provided a massive boost to Union Berlin's survival hopes, moving them out of the relegation zone, while Leverkusen missed a chance to extend their lead at the top. The Union Berlin manager called it a "perfect tactical performance," and the Leverkusen coach rued his team's lack of cutting edge. Union's starting XI executed a disciplined defensive masterclass to secure a famous three points.