Atletico Madrid travelled to Osasuna on Sunday evening looking to move level on 63 points with La Liga leaders Real Madrid.
The visitors were behind inside six minutes, however, when Alvaro Cejudo converted a corner from inside the box, before Emiliano Armenteros made it 2-0 after 21 minutes.
Osasuna were not finished in the first half and scored their third after 42 minutes courtesy of a header from Roberto Torres.
Atletico made changes in the second period, but it made little difference as the home side recorded a famous win over the capital outfit.
Read how it all unfolded in Sports Mole's minute-by-minute live commentary of the action below.
OSASUNA: Fernandez; Bertran, Loties, Arribas, Damia; Cejudo, Lolo, Silva; Armenteros, Riera, Torres
ATLETICO: Courtois; Juanfran, Alderweireld, Godin, Filipe; Gabi, Suarez, Diego; Adrian, Costa, Villa
¡Todo preparado en nuestro vestuario! #VamosRojos #Osasuna pic.twitter.com/otXh88tDFd
— CA OSASUNA (@CAOsasuna) February 23, 2014
3 - Atletico Madrid have won their last three visits to Pamplona in La Liga, keeping a clean sheet in each of their last two. Assault.
— OptaJose (@OptaJose) February 23, 2014
Simeone only believes in the style that has taken him where he is. But now he needs to change (more control, better possession) and can't.
— Guillem Balague (@GuillemBalague) February 23, 2014