US Mondorf-les-Bains pulled off a significant upset by defeating title contenders F91 Dudelange 3-1 at home in the Luxembourg National Division on October 26, 2025. This result served as a major statement from Mondorf-les-Bains, showcasing their ability to compete with the league's traditional powerhouses. The home team started brightly, taking a surprise lead in the first half and doubling their advantage shortly after. Dudelange, a club with a rich history of success, pulled a goal back to set up a tense finale, but Mondorf-les-Bains sealed the victory with a decisive third goal in the closing stages. The match was a testament to Mondorf's tactical discipline and effective counter-attacking play, which neutralized Dudelange's attacking threats. This victory provided a massive boost to Mondorf-les-Bains' league position and confidence, while dealing a blow to Dudelange's championship aspirations. The home manager hailed it as a complete team performance, while the Dudelange coach criticized his side's slow start and defensive errors.