In the 10th round of La Liga, Barcelona suffered a 1-2 home defeat to Real Madrid in El Clásico.
Barcelona had previously won all 9 of their La Liga matches this season, but this loss ended their unbeaten run.
With Barcelona’s defeat, another unbeaten team has fallen in Europe’s top five leagues this season, leaving six teams still undefeated.
These six teams are spread across two leagues: Bayern and Dortmund in the Bundesliga, each with 5 wins and 2 draws, and Milan, Inter, Roma, and Lazio in Serie A.