CA Osasuna pulled off a stunning victory as they defeated Real Madrid CF 2-1 in their La Liga match, causing one of the biggest upsets of the season so far. The hosts earned a crucial lead through goals from Marcos André and Chimy Ávila, while the visitors managed to get one back through a David Alaba penalty. The win moves Osasuna up the table, while Real Madrid's struggles continue, putting pressure on their head coach.