Raul Garcia scored in each half as Osasuna secured their first win at Atletico Madrid since 2009, beating the hosts 4-1 in LaLiga on Sunday and handing them their second home loss of the league campaign.
The visitors scored in the 26th minute when Alejandro Catena headed it down inside the box for Garcia to score.
Osasuna doubled their lead in the 52nd minute with Atletico keeper Jan Oblak s block falling to substitute Aimar Oroz for a close-range finish.
Atletico struck back three minutes later with substitute Alvaro Morata scoring off Angel Correa s cross from the left.
But Garcia restored Osasuna s two-goal cushion in the 64th minute, before Lucas Torro sealed the victory, hammering home with his right foot in the 88th.
Osasuna s first win in seven matches lifted them to 11th place in the league with 44 points from 37 matches. Atletico, who have 73 points, will finish fourth after falling five points behind third-placed Girona.
3 Atlético de Madrid have conceded 3+goals in eight home games in LaLiga under Diego Simeone, three of them in the current season. Ease.
— OptaJose (@OptaJose)
Data Debrief: Difference in finishing proves decisive
Atletico managed 14 shots on goal, compared to Osasuna s total of 15, the expected goals battle was also close (1.72 v 1.84) and the hosts edged the possession count with 56.7%.
But clinical finishing from Osasuna was the difference, with six of their shots finding the target and four of them beating home goalkeeper Oblak.
Atletico, meanwhile, only had one other attempt on target apart from Morata s goal. Griezmann (four), Samuel Lino, Rodrigo De Paul and Correa (all two) combined for 10 attempts, with only one of those working Sergio Herrera in the Osasuna goal.