Real Madrid dropped crucial points in the Liga title race as goals from Alex Berenguer and Gorka Guruzeta secured a historic victory for Athletic Club at the San Mames.
Berenguer handed the hosts the lead just after the break when a moment of quality by Inaki Williams saw a threatening cross cut out Real Madrid’s backline, with Berenguer stabbing home Thibault Courtois’ block.
Real Madrid were handed a way back into the game in the 67th minute when Julen Agirrezabala clattered into Antonio Rudiger in the box when clearing a Rodrygo free-kick. It was Kylian Mbappe who would go on to take but in a moment of redemption for the Athletic Club goalkeeper, Agirrezabala saved with a dive to his left.
Real Madrid found an equaliser as Jude Bellingham looked to have rescued a point for the away side when he was able to tuck home a parried Mbappe effort on goal.
However, shortly after, a costly mistake would see Real Madrid drop all three points for the second time this season as Federico Valverde was dispossessed by substitute Gorka Guruzeta, who slotted past Courtois in the 80th minute.
Next, Athletic Club have another tough test against Villarreal on Sunday, December 8, before a trip to face Fenerbahce in the Europa League. Whilst Real Madrid are on the road again as he travel to face Girona at the weekend, before a trip to Italy in the UEFA Champions League to take on Atalanta.