Torres was hit from behind by Deportivo’s Alex Bergantinos in a clash of heads five minutes from time and hit the ground hard as he appeared to have already lost consciousness.
Players from both sides immediately called for medical attention when he hit the ground.
He was assisted for several minutes by doctors before being taken out on a stretcher and transferred to hospital.
Distressed Atletico defender Jose Maria Gimenez was seen crying, whilst Deportivo fans gave the former Spanish international a standing ovation as he was carried from the field.
Teammate Filipe Luís said after the game that the team had received “good news” regarding Torres.
Reports from the hospital confirmed the Torres did lose consciousness on the pitch but was in a stable condition.