San Sebastian, Spain (SportsNetwork.com) - Real Sociedad pulled off a 2-1 upset win over 10-man Atletico Madrid at the Anoeta on Sunday as Imanol Agirretxe scored the winning goal eight minutes from time.
The two sides traded goals in the opening 15 minutes with Mario Mandzukic firing Atletico in front in the 10th before Carlos Vela equalized for Sociedad five minutes later.
Atletico's Guilherme Siqueira then picked up two yellow cards in the span of three second-half minutes, and Agirretxe took advantage by heading home the winner in the 82nd to hand Sociedad their second win of the campaign.
The loss drops Atletico into fourth place and four points adrift of leaders Real Madrid.
Raul Garcia was the architect of the first goal as he sent a cross into the box from the right wing that found the foot of Mandzukic for an easy tap in.
But Vela had a response within five minutes after he picked up a ball from Bergara Markel and stroked home a left-footed effort past diving goalkeeper Miguel Moya.
Sociedad was getting the better of the chances as the match wore on, and it took a goal line clearance from Atletico's Diego Godin to deny Agirretxe before halftime.
Atletico's chances at collecting three points were greatly reduced five minutes into the second half when Siqueira fouled Vela to pick up a second yellow card.
Moya made a good stop on Vela to keep the match level, but Joseba Zaldua's cross picked out Agirretxe, who turned a header past Moya from the middle of the box.
Valencia sits in third place, three points back of Real Madrid, after being held to a 0-0 draw at home by Athletic Bilbao, Diego Colotto rescued a point for Espanyol with a goal in the 90th minute to salvage a 1-1 draw with Villarreal, while Levante and Sevilla played to a 1-1 deadlock as Victor Casadesus struck an equalizer for Levante 10 minutes from time.