Sevilla winger Antonio Puerta remains in critical condition.
The 22-year-old Spain international was taken to the Hospital Virgen del Rocio in Seville after collapsing during the first half of Saturday's defeat of Getafe.
He was able to walk from the pitch after being attended by medical staff who prevented him swallowing his tongue but he then collapsed again in the changing rooms and was given cardiac resuscitation.
Yesterday's bulletin from Dr Francisco Murillo, head of the hospital's intensive care unit, read: "Puerta still needs assisted ventilation and is sedated as a consequence of suffering from prolonged cardiac arrest.
"The cardiac arrest was caused by repetitive serious ventricular arrhythmias. At this time the ventricular arrhythmia is under control . . . the patient's prognosis is still critical following the consequences of the cardiac arrest, which included brain damage."