Union Saint-Gilloise pulled off a major upset, defeating Atalanta 1-0 in a UEFA Champions League match at the Stade Joseph Marien on January 29, 2026. The Belgian underdogs secured a famous victory with a disciplined defensive performance and a solitary, well-taken goal in the second half. The match was a tense affair, with Atalanta enjoying the majority of possession but struggling to break down Union's compact and organized defensive block. The decisive moment came from a swift counter-attack, finished calmly by the Union striker to send the home crowd into raptures. Atalanta threw everything forward in search of an equalizer but found the Union goalkeeper in inspired form, making several crucial late saves. The three points were a monumental achievement for Union Saint-Gilloise in their debut Champions League campaign. The Union coach hailed it as a victory for teamwork and belief, while the Atalanta manager rued his team's lack of cutting edge.